Here goes the list of our posts on Force in physics and related topics and subtopics.

#### Simple Machine operation – Bottle opener

The following 2 sections will briefly cover the following:1) How in a simple machine input force (effort) is converted to output force or resistance force?2) How in a simple machine ...

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#### Simple machines and Complex machines – examples

We use different types of machines in our daily life. They may be simple machines or complex machines. 1>Simple machines - Some machines are simple tools or simple machines like ...

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#### Thrust and Pressure Numericals for class 9 [solved]

In this post, we have solved a set of Thrust and Pressure Numericals for class 9. Thrust and Pressure Numericals for class 9 (Q1) Calculate the pressure exerted by a ...

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#### Centripetal force sources – sources of centripetal forces

In this post, you will find a List of Common circular motions and the sources of centripetal force (in tabular format) for each of these motions. Any force can be ...

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#### Centripetal And Centrifugal Force

In this post, we will define centripetal force and centrifugal force, and find out how these two differ from each other. We will also go through some examples of these ...

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#### pulley systems: block and tackle

A block and tackle is a compact system of pulleys designed to raise heavy loads. The block and tackle system has one cable or rope wound around two separate sets ...

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#### coefficient of static friction (μs) = tan θ

In this post, we will see how the coefficient of static friction (μs) = tan θ, where θ is the angle of inclination where static friction becomes the highest. In ...

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#### Coefficient of Restitution – definition, formula, numerical

In this post, we will cover the definition and formula of the coefficient of restitution. We will also see how types of collision can be determined from the value of ...

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#### Three things are worth noting about frictional forces

Three things are worth noting about frictional forces: these fundamental points will help you to understand friction as a force, answer questions from the friction chapter and solve numerical problems ...

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#### Types of pulleys and how they differ in their operation

In this post, we will discuss three types of pulleys, and how they operate, and how they differ in their operation and utilities. The types we will discuss are (1) ...

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#### Examples and Practical use of Inelastic collisions

In this post, we will study a few examples of Inelastic collisions. Also, we will study an important practical use of Inelastic collisions. When objects stick together or are joined ...

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#### Equations valid for elastic collisions

In this post, we will briefly mention the equations valid for elastic collisions. We can use these equations to solve numerical problems related to elastic collisions. The Equation for the ...

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#### Explosion and Conservation of Momentum

An explosion can be thought of as a single object separating into two or more fragments. In this post, we will see if the law of conservation of momentum is ...

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#### Toppling, stability & the position of the centre of mass of a body

The position of the center of mass of a body affects whether or not it topples over easily. This is important in the design of such things as tall vehicles ...

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#### Locating the Centre of mass using a plumb line

In this post, we will see how to find the centre of mass using a plumb line. Suppose we have to find the centre of mass of an irregularly shaped ...

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#### AQA GCSE Physics – Equations & Formulae from Forces chapter

The image below shows a list of equations and formulae from the chapter "Forces" of the GCSE Physics syllabus. This is also helpful for all other equivalent boards like CBSE, ...

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#### Atwood machine when pulley has a non-zero mass

In this post, we will analyze one Atwood machine when its pulley has a non-zero mass. As a result this pulley has a nonzero moment of inertia. when pulley has ...

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#### Center of Mass of a system and its velocity – definition & equation

In this post, we will discuss the Center of Mass and its Momentum & velocity. Center of mass - for a single object & for collection of masses The center ...

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#### Force & Laws of Motion worksheet for class 9 – MCQ

This post presents a Force & Laws of Motion worksheet for class 9 (MCQ worksheet) with multiple choice questions taken from the chapters (a) Laws of motion & (b) Force ...

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#### Deriving the equation of Centripetal acceleration (using trigonometry)

In this post, we will derive the equation of centripetal acceleration using trigonometry. In a different post, we have done the derivation of the equation of centripetal acceleration using differential ...

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#### Ways to Reduce Friction & Ways to Increase Friction

We need to reduce or increase friction in different situations, depending on our requirements and benefits. Here, in this post, we will list down some efficient ways to reduce friction ...

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#### Tension force in a string – class notes

A lot of problems we discuss involve ropes and strings. Most of the time, we assume that they are massless, or more precisely, that the mass of a string is ...

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#### Newton’s third law from the equation of conservation of linear momentum

In this post, we will see how Newton's third law can be derived from the equation of conservation of momentum. Derive Newton's third law from the equation of conservation of ...

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#### Common forces – types, definition & examples

In this post, we will discuss 8 common forces we find in Physics. For every such force type, we will find out the cause or reason or source of the ...

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#### Uniform circular motion

In this post, we will cover a bunch of questions and equations from the Uniform Circular motion chapter. When a particle moves in a circle with constant speed, the motion ...

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#### Shape change by Forces & stretching a spring

Let's discuss the application of forces to change the shape of an object and the concept of elasticity related to this shape change. We will cover the stretching of spring ...

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#### Derive formulas of centripetal force & centripetal acceleration

In this post, we will derive formulas of centripetal acceleration & centripetal force while we discuss the uniform circular motion. Uniform circular motion & its acceleration An object moving with ...

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#### Numerical problem on car hydraulic braking – solving

In this post, we will solve a numerical problem based on the principle of a car hydraulic braking system. To solve this numerical, we will take the help of the ...

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#### 3 Types of collisions & their basic differences

In this post, we will list down the differences among the 3 primary types of collisions, elastic, inelastic & perfectly inelastic collisions. Among these types of collisions, elastic and perfectly ...

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#### How is Pulley a kind of lever?

A pulley is a grooved wheel with a rope, chain, or cable running along the groove. A pulley can change the direction of the input force or increase the output ...

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#### Applications of Impulse to improve safety – physics notes

Improving safety and reducing injuries is a critical application of impulse. In many cases, an object must be brought to a complete stop from a given initial velocity. This indicates ...

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#### How to solve leaning ladder equilibrium numerical?

In this post, we will solve a numerical problem based on the equilibrium of a leaning ladder. To do this you need to first understand the conditions of equilibrium. If ...

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#### Different types of Pressure gauges & how they operate

Pressure gauges measure the pressure exerted by a fluid, in other words by a liquid or a gas. We will cover 3 types of pressure gauges here, and these are ...

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#### How to use Pascal’s law to explain Hydraulic car brakes?

Pascal's Law states that any change in the pressure applied to a completely enclosed fluid is transmitted undiminished to all parts of the fluid and the enclosing walls. Let's see ...

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#### Measurement of coefficients of friction

This post discusses a typical experimental setup for the Measurement of coefficients of friction. As you well know, it’s easier to push an object from one point to another than ...

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#### Car safety, momentum & force – GCSE Physics

Car safety, momentum & force (GCSE Physics) - Here, we will discuss how momentum and force in physics can influence car safety and its design. The force on a person ...

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#### How to find out the Mechanical Advantage of Pulley | MA & IMA pulley

Of all simple machines, the mechanical advantage is easiest to calculate for pulleys. To find out the mechanical advantage of a Pulley, simply count the number of ropes supporting the ...

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#### Racecar tires versus passenger car Tires – The Physics of Car Tires (based on Friction) | Slick Tyre vs. Road Tyre – based on frictional force

You must have noticed that the racing car tires are made of rubbers, but without any treads. But why is it so? To answer this we have to compare Racecar ...

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#### Bearings to reduce friction and increase the efficiency of devices

There are different ways to reduce friction. One way to reduce friction and increase the efficiency of devices such as generators, motors, and fans is to use bearings. Bearings are ...

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#### How do Running shoes increase the force of static friction exerted by the ground on the athlete?

This post gives a preliminary idea of how physics fundamentals like friction and Newton's laws of motion are involved in the design aspects of running shoes. Nowadays when sports have ...

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#### Solving Numerical Problems involving Frictional Force or friction – for class 11

Here we will focus on solving numerical problems involving frictional force or friction and friction coefficient. We will take up a few sample problems as examples and solve those using ...

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#### What is Mechanical Advantage? | What is MA – definition

Mechanical Advantage (MA) is the ability to lift or move objects (load) with a large output force while applying only a little input force. The trade-off is that you must ...

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#### State the three Laws of motion | State Newton’s laws of motion | List down the concepts we find from the laws of motion

Here we state the 3 laws of motion: Newton’s 1st Law of motion states that Every body continues in its state of rest, or of uniform motion in a straight ...

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#### The differences between Uniform circular motion and projectile motion with diagrams

The acceleration in a uniform circular motion (Fig. 1) has some similarities to the acceleration in projectile motion (Fig. 2) without air resistance, but there are also some important differences ...

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#### [PDF Notes] Gravity and Mechanical energy – grade 10 Notes download | class 10 physics notes on Gravity & Mechanical Energy

This Gravity and Mechanical energy Notes [PDF] is primarily for the 10th grade physics syllabus of different international boards. This also covers the class 10 physics syllabus on Gravity and ...

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#### [pdf notes] Force, Momentum, Impulse – Grade 11 Notes download | class 11 physics notes on Force, Momentum, Impulse

This Force, Momentum, Impulse Notes [PDF download] is primarily for the 11th grade physics syllabus of different international boards. This also covers the class 11 physics syllabus on Electric Circuits ...

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#### Normal Force – for horizontal surface and inclined plane with formula

The contact force provided by a surface that is perpendicular to another surface is called the normal reaction force. It is often abbreviated to the normal force and represented by ...

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#### Physics numerical problems worksheet on centripetal force & circular motion

Here goes a Physics numerical problems worksheet on centripetal force and circular motion. Solutions are also appended in this post for our students. Physics numerical worksheet on centripetal force & ...

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#### IGCSE physics force and motion worksheet with numerical problems | with solution

Here you will get 2 sets of IGCSE physics force and motion worksheet with numerical problems with solution. You will get ample scope to test your understanding of motion equations ...

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#### IGCSE Physics Definitions – Forces and Motion

IGCSE Physics Definitions from the Forces and Motion chapter are listed below. It contains definitions for vector, scalar, torque, CG, velocity, force, acceleration, and important laws like Newton's laws of ...

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#### How to Determine g in laboratory | Value of acceleration due to gravity – determination in Lab

We will see here how to determine g in the laboratory. g is the symbol of acceleration due to gravity. The basic idea behind determining g in the laboratory is ...

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#### Motion graphs of vertical fall against air-drag | Motion graphs of falling objects when air resistance is present

Here we will discuss the motion graphs of vertically falling objects when air-drag or air-resistance is present. Certainly, it's not a free fall as during free-fall air drag is ignored ...

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#### How is Stability of a body related to its Centre of Gravity?

The stability of an object is related to the position of its center of gravity (CG). If the vertical through the CG passes through the base of an object, then ...

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#### Collisions and Newton’s Laws of Motion – How to relate these?

This post covers how Collisions and Newton's Laws of Motion are related. As collisions, we can take examples of the interaction between two bodies (gun-bullet, skater-skateboard, hose-water). For simplicity let ...

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#### Numerical Problems on Equilibrium | Physics Worksheet

This post presents Numerical problems on Equilibrium. This physics worksheet will help students who are preparing for AP Physics, IIT JEE, and other competitive examinations to test their preparedness. This ...

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#### Numerical Problems on Collisions (Elastic & inelastic collision) physics

Here is a numerical worksheet based on Collision physics that includes numerical problems related to elastic and inelastic collisions. Here is another set of solved numerical problems you must try ...

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#### Acceleration due to gravity of a body is independent of its mass-How to Show mathematically?

Acceleration due to gravity of a body is independent of its mass - let's show it mathematically. We will consider a body of mass m on the surface of the ...

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#### Numerical problem on Terminal Velocity with solution

In this post we will solve Numerical problems on Terminal Velocity. Here is the first set. Numerical problem on Terminal Velocity with solution 1 ) Find the terminal velocity of ...

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#### How to derive Terminal Velocity equation using Stokes’ law (step by step)

Here we will work on the derivation of the Terminal Velocity equation or formula using Stokes' Law. We will consider a situation where a solid sphere moving slowly in a ...

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#### What is Stokes’ Law and what is the Formula for viscous drag?

Stokes' Law and its formula: Eminent physicist Sir Stokes investigated fluid dynamics and came up with an equation for the viscous drag (F) on a small sphere at low speeds ...

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#### What is Centre of Gravity & where to find it in some regular objects easily?

In this post, we'll first discuss what the Centre of Gravity is. And then we'll quickly list down where to find the centre of gravity in some regular objects easily.In ...

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#### Elastic collision and Inelastic collision

Collisions are often classified according to whether the total kinetic energy changes during the collision and as per this classification collisions are of 2 types, Elastic collision, and Inelastic collision ...

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#### How to use Pascal’s principle (or Pascal’s law) in Hydraulic Car Lift?

We will first see what Pascal's Principle or Pascal's Law states. Then we will find out with formula and diagram how to apply Pascal's Law to explain the operating principle ...

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#### How Strong is the Coulomb Force Relative to the Gravitational Force?

How Strong is the Electrostatic or Coulomb Force Relative to the Gravitational Force? To find this we will calculate the electrostatic force and the gravitational force between an electron and ...

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#### Conservative force & Nonconservative force

Often we hear these two terms as we discuss Work and Force in our physics class - conservative force and Nonconservative force. Here we will talk about these two and ...

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#### Free Body Diagram – What is FBD and How to draw an FBD?

This post will tell you what a Free Body Diagram or FBD is. Also, you will get a step-by-step guide on How to draw an FBD while solving a problem ...

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#### How does Parachute motion happen under gravity and air drag? Explain with time graph

Parachute motion under the influence of gravity and air drag (resistance) and the speed-time graph of this fall - This is the topic of this post. And we will cover ...

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#### How do the Banked Curve & Banking Angle help a car? | banking angle formula with derivation

Banking Angle - what is the banking angle and why is it important?When a car travels without skidding around an unbanked curve, the static frictional force between the tires and ...

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#### Numerical problems based on the inclined plane physics – solved

In this post, we will focus on numerical problems based on inclined plane physics. We will list down the problems and solve them one by one. Numerical problems based on ...

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#### Define Inertial frame of reference and Non-inertial frame of reference

Let's Define the Inertial frame of reference and the Non-inertial frame of reference. A frame of reference can be any one of these two types: Inertial frame of reference & ...

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#### Pressure problems and solutions – Practice Problems & Numericals class 9

In this post, you will find a set of Pressure problems and solutions, where we have solved Practice problems based on Thrust and Pressure Numericals for class 9. With the ...

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#### How does pressure vary with depth in a fluid of constant density? | with the equation of the fluid pressure

Variation of pressure with depth in a fluid of constant density or How does pressure varies with depth in a fluid of constant density? - this is the topic of ...

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#### Pressure definition & formula and SI unit

Let's go through the following subtopics: (1) Pressure definition (2) formula of pressure and (3) SI unit of pressure Definition of Pressure Pressure (P) is defined as the normal force ...

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#### Forces acting on a mass sliding down an inclined plane – using vector resolution

In this post, we will discuss the forces acting on a mass sliding down an inclined plane. To do this we will take the help of the concepts of Vector ...

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#### Relative Velocity – explanation with Vector concepts

Relative velocity: The velocity of an object measured by a moving observer is referred to as the relative velocity. The relative velocity is the difference between the velocity of the ...

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#### Inertia – definition in physics

Inertia: From Newton’s first law of motion we get the definition of inertia. As per this law, an object can’t change its state of motion by itself. If the object ...

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#### The Friction Coefficient | Coefficient of Friction – questions, answers for class 11

This post is entirely focused on the Friction coefficient (also known as the coefficient of friction). We will define it and find out its types. Also, we will derive equations ...

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#### Force and Laws of Motion Class 9 Numericals

This page presents a few sets of force and laws of motion class 9 numericals. We have used linear motion equations and force equations to solve these numerical problems. [detailed ...

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#### Pulley in Physics – pulley tension problems with solution

Here in this tutorial, we will study a few pulley systems to find out how to solve pulley tension problems as well. Pulley in Physics is one of the most ...

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#### Apparent weight of moving car over a convex or concave bridge

Apparent weight of a moving car over a convex or concave bridge is the amount of Normal Reaction the car receives while traveling over the bridge. Here the system consists ...

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#### State and Prove Impulse Momentum Theorem with derivation of equation

In this post, we will State and Prove the Impulse Momentum Theorem with the derivation of the equation. As evident, this theorem or principle is related to impulse and momentum ...

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#### Impulse – definition, formula, unit

Impulse Definition If a force acts on a body for a very brief time then we say that an impulse is generated. As example, when we hit a ball with ...

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#### Elevator problems in physics with pseudo force

Elevator problems in physics with pseudo force - When an elevator is moving with an acceleration, it becomes a non-inertial frame of reference. We find it difficult to apply Newton's ...

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#### Friction definition | contact force as the cause of friction

Friction / Friction definition: If we either slide or attempt to slide a body over a surface, the motion is resisted by a bonding (cold-weld) between the body and the ...

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#### Newton’s Second Law and equation of Force

Newton’s Second Law states that the rate of change of momentum of a body is directly proportional to the net force applied on it, and this change in momentum takes ...

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#### Physics problems with pseudo force and solutions

Physics problems with pseudo force with solutions- these problems are going to be related to the noninertial frame of reference.Let's solve an interesting numerical.A smooth inclined plane with an angle ...

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#### Contact Forces between blocks – Application of Newton’s laws

Application of newton's laws: Newton's laws of motion give us concepts of force (first law), measurement of force with its equation (second law), and the reaction of force (3rd law) ...

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#### Pseudo force in Physics-did you know this?

What is a pseudo force? - Some forces are real, whereas others are not. Real forces have some physical origin, such as a gravitational pull, frictional force, or tension of ...

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#### Equilibrium of a rigid body-conditions and physics

A rigid body is said to be in mechanical equilibrium if both its linear momentum and angular momentum are not changing with time. In other words, the body is in ...

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#### Newton’s Third Law of motion – concepts and examples

Newton's third law of motion states that to every action there is an equal and opposite reaction. This means for every action or force exerted by the first object on ...

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#### Weightlessness in a Satellite-feeling weightless in Orbiting Satellites

In this post we will discuss how does an astronaut feel weightless in a nearby orbit and what is the secret behind this weightlessness in a satellite? To start with ...

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#### Critical Velocity in Vertical Circular motion – minimum velocity for a vertical circle

Today's topic is Critical velocity in a vertical circular motion. Once we are done with its definition we will derive the Critical Velocity formula. Definition: The minimum velocity of an ...

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#### Terminal Velocity, Free Fall, & Drag force

Here we will discuss in detail the terminal velocity and Terminal Velocity Equation. Before that, we will also cover a few important pointers on free fall and then discuss Air Drag ...

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#### Centripetal Force and Washing machine – How centripetal force helps Washing machine operation

Centripetal Force concepts & facts with examples and Washing machine: In this post, we will discuss the fundamental concepts of centripetal force & its real-life examples like how the centripetal ...

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#### Elevator problems in Physics – 5 Elevator Case Studies for you to solve

In this topic, we will see an application of Newton's Second Law in 5 selected cases of Elevator movement, which will help us to solve elevator problems in Physics with ...

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#### How Friction helps in walking?-explanation with a free body diagram

"If Friction is a force that opposes motion then how friction helps in walking?" As we walk we apply a contact force on the surface below and that surface also ...

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#### Mass and Weight – are they the same or different?

Mass and Weight - are they the same or different? Mass and weight are different. Mass is the quantity of matter; it is an absolute measurement of how much matter ...

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#### Newton’s First Law of Motion doesn’t hold good for every frame of reference

The frame of reference and Newton's first law of motion - This law says that if the sum of all the forces acting on a particle is zero then a ...

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#### Pushing a car, Newton’s 3rd Law and Friction

Hope you have seen people pushing their car when it's not starting due to some issue.When someone is pushing a car or something like that, he first pushes the ground ...

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#### Force in Physics

In this post, we will discuss the fundamentals of Force in physics which will include the definition of force and force formula, types and examples of force, reference to Newton's ...

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