High School Physics + more
Lami’s theorem is used to solve numerical problems of electrostatics when electrostatic forces are in equilibrium. To solve some questions of electrostatics, Lami’s theorem is very useful. Lami’s theorem (when forces are in equilibrium) If three forces are in equilibrium, as shown in figure 1, it means that F1 + F2 + F3 = 0, […]
This post presents a list of facts and formulas from the Fluid flow chapter of class 11 (grade 11) physics.
In this post, we will discuss how the P-V diagram can help us to calculate the work done by a system or on a system. We will derive the equation of work done in terms of pressure and volume. We will solve a few numerical problems as well based on P-V diagrams. Setup to get […]
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 maintained during an explosion. We will solve related numerical problems as well. Some familiar examples of explosions are: a bomb blowing into fragments a bullet […]
In this post, find Gravitational Potential Numericals in a solved worksheet (numerical). And, we will solve a bunch of numerical problems (Questions and answers) with the help of the concept and formula of Gravitational Potential, gravitational potential energy, & gravitational force. Also solve: Numericals on Gravitational force and Universal Law of gravitation – class 9 […]
In this post, we have compiled a bunch of interesting numerical problems on Resistivity and Conductivity. These are Solved numerical problems (Worked Solutions). Resistivity and Conductivity numerical problems (solved worksheet) 1 ) Gold has a conductivity of 45 MS m−1. What is the resistance of a 0.01 m diameter gold connector that is 0.05m long? […]
A liter of water has a mass of 1.00 kg, but the same volume of methylated spirits has a mass of only 0.79 kg. We can say that the density of methylated spirits is 0.79 that of water. This is called its relative density (RD) or its specific gravity (SG). The two terms ( relative […]
In this post on the Heating effect of electric current class 10 Numericals, we will list down the Heating Effect formulas or Equations of electric power and energy. And, then we will solve a bunch of numerical problems as well using these formulas.
In this post, we will first find out what the efficiency of a machine means, and then we will solve numerical problems using the concept and formula of the efficiency of machines. If a machine, such as an electric motor, is used to raise a load, electrical energy must be provided to the motor. This […]
In this post, we will study a probable set of force vectors on an aeroplane in steady flight. The forces acting on an aeroplane (airplane) are shown in Figure 1. force vectors on an aeroplane in steady flight Let’s list down the force components acting on the airplane when it’s having a steady flight. The […]
In this post, we will review the formula of Rotational Kinetic Energy and then solve Numerical problems based on Rotational Kinetic Energy.
In this post, we will find the equation of the work done by Torque. (In other words, we will work with the equation of rotational work.) Then we solve a few numerical problems using this formula of rotational work. Equation of the work done by Torque | equation of rotational work Here we will find […]
In this post, we will focus on the formulas of the moment of inertia and also will solve a few interesting sample numerical problems using the moment of inertia formulas. Moments of Inertia – concepts & definition The torque equation gives us: τ =mr2α . This is an important result because it relates to torque […]
In this post, we will quickly revise Archimedes’ Principle and its legendary background. Then we will solve a few numerical problems in physics using this principle. Archimedes’ Principle and Buoyancy If an object is submerged in a liquid, the object displaces a volume of the liquid equal to the volume of the submerged object. There is […]
In this post, we will solve a few numerical problems using the First Law of Thermodynamics. Numerical problems on first law of thermodynamics Question number 1) Complete the values in Table 1 (all values are in kJ). Note that: W = 6 kJ is the work done on the system. Solution: As per the data […]
In this post, we will derive the equation of the total energy of an orbiting body, and then will solve a numerical problem using the formula derived. Derive the formula of the total energy of an orbiting body (or satellite) To calculate the total energy of an orbiting body (say a satellite) we have to […]
In this post, we will solve a few selected numerical problems from the Surface Tension chapter (Physics class 11). Numerical problems from the Surface Tension chapter 1 ) A wire bent in the form of a ring of radius 5 cm rests on the surface of the water in a beaker. A force of 4.4 […]
Here in this post, we will convert L atm to Joule. L atm is also known as Litre Atmosphere. L atm to Joule L atm is the product of 2 units and these 2 units are Litre (unit of volume) and Atmospheric pressure (or atmosphere which is a unit of pressure). L atm, hence, is […]
In this post, we will solve a numerical problem from the Thermodynamics chapter. We will use the enthalpy and internal energy equation. The goal of this numerical is to calculate Internal Energy Change (𝚫U) for a chemical Reaction to make ammonia. Numerical problem from the Thermodynamics chapter – with solution Question: The reaction of nitrogen […]
In this post, we will solve a few interesting numerical problems based on specific heat capacity. Learn more about Specific heat capacity here. Solving numerical problems using specific heat capacity formula Question 1] A tank holding 30 kg of water is heated by a 3 kW electric immersion heater. If the specific heat capacity of […]
Let’s solve numerical problems based on the Young modulus formula. First, we will go through the formula of Young modulus and then we will use this to solve a few selected numerical problems. Young modulus Formula Young’s Modulus is the ratio of Longitudinal Stress and Longitudinal Strain. If it’s designated with Y then: Y = Longitudinal […]
In this post, we will solve a few Numerical Problems based on the Combined Gas law (or Gas equation) & the Ideal gas equation. The Formulas used to solve the numerical problems are: PV / T = constant (k) pV = nRT Example 1 A sample of nitrogen occupies a volume of 1.0 L at a […]
Let’s solve a sample numerical problem (from the gas chapter) using Gay Lussac’s law or pressure law. The formula to be used is as follows: P1/T1 = P2/T2 Example 1 A chamber of the constant volume contains hydrogen gas. When the chamber is immersed in a bath of melting ice (0°C), the pressure of the […]
In this post, we will solve numerical problems using Charles’ Law. The formulas to be used are as follows: If V1 is the volume of a certain mass of a gas at temperature T1 and V2 is the volume of the same mass of the same gas at temperature T2 at constant pressure, then according […]
Here we will present a set of solved numerical problems that use Boyle’s law formula to solve the numerical problems on gas. The primary formula that will be used to solve these numerical problems is p1V1 = p2V2 = constant. where p1 and V1 are initial pressure and initial volume of the gas respectively. Similarly, […]
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 concepts of the lever, and the pressure principle of Pascal. We will go through the problem statement first and then solve the numerical step-by-step. Numerical […]
This post presents a few important numerical problems in physics that you can solve using the concepts of resistivity. If you want a quick revision to memorize the resistivity formula then you can check this post on resistivity formula derivation. Note: Remember that: (1) resistivity is a property of the material (2) the unit of […]
In this post, we will see how to solve numerical problems on terminal velocity. We will discuss the concept in brief and then take sample problem/s and solve them using the appropriate formula of terminal velocity. Theory & formula to solve terminal velocity numerical The first numerical problem in this post is about a spherical […]
In some situations, the use of conservation of energy can be a much simpler method to solve projectile motion problems than using the kinematics equations. Solving projectile motion problems makes use of the fact that Ek + Ep = constant at every point in the object’s flight (assuming no loss of energy due to friction). […]
This topic covers Dimensional Analysis & its uses. The term dimension is used to refer to the physical nature of a quantity and the type of unit used to specify it. Distance has the dimension of length, which is symbolized as [L], while speed has the dimensions of length [L] divided by time [T], or […]
Energy is transferred or transformed from one energy form to another via an energy pathway. In this post, we will briefly discuss the following topics: (a) different forms of energy (b) different mechanisms of energy transformation or conversion or transfer (c) Numerical problems related to energy conversion or transformation with the solution. Here let’s quickly […]
This post presents a Q&A worksheet covering distance-time graph and velocity-time graph. Before you try to solve these, you may read our posts on the distance-time graph (d-t graph) and the velocity-time graph (v-t graph).
Here we have a set of numerical problems based on Snell’s Law from the chapter ‘Light‘ of fundamental physics. This numerical set is a bit harder to solve but certainly will be helpful to strengthen your concepts on Snell’s Law.Read about this law and its formula here: our post on Snell’s Law Harder Set of […]
Numerical problems on collisions of objects in two dimensions. We will solve the collision problems using axial-vector components and the law of conservation of momentum.
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 the step-by-step process.
While guiding students with their physics syllabus often we face these queries from the students: “How to solve numerical problems in physics?” or “How to solve problems in physics?”. A similar question arises again while solving chemistry numerical as well. The activity of problem-solving in physics (or chemistry) is made easier by using certain techniques […]
This post is to guide the students who have opted for Physics as a subject for their class 11. We will have a broad view of the topics and chapters to be studied and also refer to the books and online study materials as a quick reckoner for the 11th Physics study, covering the NCERT […]
This post presents a Leaving Cert Physics Gravity worksheet with Numerical Problems & solutions. You can take it as Leaving Certificate Universal Law of gravitation worksheet as well. You can browse through our post on the derivation of the law of gravitation and the formula of the gravitational force if you want to brush up […]
This post is all about Rotational Kinematics Numerical Problems and solutions. We will use the following four rotational kinematic equations (presented together with their translational counterparts) to solve the numerical problems. Rotational kinematic equations | equations used to solve rotational motion numerical In these equations, the subscript 0 denotes initial values (ω0 and vo are initial values). […]
Here goes a set of Circular Motion Problems. This set contains Physics numerical problems on centripetal force and uniform circular motion for class 11. Solutions are also appended in this post for our students.