# Energy_21

## What type of lever is standing on toes? | second class lever in our body

Standing on toes acts as a second class lever (also known as class II or type 2 lever). This is an example of the presence of a lever mechanism in the human body.The foot acting as a lever arm with calf muscle supplying an upward effort, the weight of the body acting as a downward […]

## What type of lever acts when we nod our head? | Nodding of Head as Lever

The nodding of the head acts as a first-class lever (also known as class I or type 1 lever). In this lever, the skull acts as the lever arm. Pivot is the place where our skull meets the top of our spine. And the neck muscles at the back of the skull provide the force […]

## What is the use of a lever if its mechanical advantage is more than 1, equal to 1 and less than 1?

If the mechanical advantage of a lever is more than 1, a lever can act as a Force Multiplier. That means using that lever more load can be overcome by applying less amount of effort. Example, Crowbar, Bottle opener, nutcracker If the mechanical advantage of a lever is less than 1, a lever can act […]

## Comparison of Scissors & shears with their mechanical advantage

Explain why scissors for cutting cloth may have blades longer than handles, but shears for cutting metals have short blades and long handles. – to explain this we need a comparison of Scissors & shears with their mechanical advantage. Scissors and shears apparently may look identical. Both of them belong to the class I lever, […]

## What is the Work done by Gravity on an object having Horizontal circular motion?

What is the Work done by Gravity on an object having Horizontal circular motion? Is it positive, negative, or zero work?

## Mechanical Advantage of Inclined Plane with formula

The mechanical advantage of an inclined plane is calculated as the ratio of the length of the incline and the height of the incline. It can also be calculated using the value of 1/(sin θ), where θ is the angle of inclination. An inclined plane is a simple machine that makes our life easier. All […]

## Potential Energy

What Is Potential Energy?Potential energy is a form of stored energy – it is the energy possessed by a body at rest due to its position or size or shape. By doing work, forces act to increase and decrease the kinetic energy of objects within a system. If the kinetic energy that’s removed can be […]

## 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 Resolution. Here we are not considering the presence of friction. Forces acting on a mass sliding down an inclined plane The first step when setting […]

## Work Energy Power – Worksheet problem solution (Q6)

A 10 kg ball is dropped from a height of 10 m. Find (a) the initial potential energy of the ball, (b) the kinetic energy just before it reaches the ground, and (c) the speed just before it reaches the ground. (a) The initial PE = mgh = 10. 9.8 . 10 = 980 J […]

## Numerical on Work Energy Power solved worksheet class 10 ICSE, CBSE

This post is focused on Numerical Problems on Work, Energy, Power with solutions, and a problem worksheet for you. This is very useful for high school students studying Physics, more precisely for class 10 students of ICSE, CBSE, international boards like IGCSE, state boards, etc.) Numerical Problems on Work, Energy, Power | class 10 ICSE, […]

## Equation of Efficiency that relates mechanical advantage and velocity ratio of an ideal machine

In this post, we will find out the equation of Efficiency that relates mechanical advantage and velocity ratio of an ideal machine. Equation of Efficiency that relates mechanical advantage and velocity ratio of an ideal machine The efficiency of a machine = Work output / Work input …. (1) Now, Work output = Load x […]

## Numerical Problems on Lever’s mechanical advantage & velocity ratio

Here you will find Numerical Problems on Lever’s mechanical advantage & velocity ratio. Try to solve and if required refer to the solutions given. We will continuously add newer problems. Numerical Problems on Lever’s mechanical advantage & velocity ratio 1 ) Calculate the mechanical advantage of a class 2 lever such that the length of […]

## Velocity Ratio – definition, formula, and values

The Velocity Ratio of a machine and the Velocity Ratio Formula are the topics of this physics article. Also, we will see how the value of the Velocity Ratio varies in the case of speed multiplier machines and Force multiplier machines. Velocity Ratio | Definition of Velocity Ratio The velocity ratio of a machine is […]

## What Is Power? – concepts and units and formula

Power is the rate at which work is done or the rate at which energy is supplied or used. Like work and energy, power is also a scalar quantity.The SI unit for power is Joules per second (Js-1), which is defined to be a Watt (W). So 1 W = 1 J/s. There are other […]

## Types of levers

What are the types of lever? The types of levers are First Class lever, Second Class lever, and Third Class lever.

## Mechanical advantage Formula – MA formula

In this post, we will talk about the Mechanical advantage formula (MA formula) for different simple machines. Mechanical advantage Formula | MA formula The Mechanical advantage formula (MA formula) can be written as follows: (1) Mechanical Advantage MA = output force/input force (2) Mechanical Advantage MA = resistance force/effort force. The machine uses this resistance […]

## Freefall in physics

In this post, we will find out (a) how to find the weight of a freely falling body (b) How the velocity of a freely falling body changes every second if we ignore air drag force (air resistance)? (c) Why do we feel weightless during freefall (d) Kinetic energy of a body under free fall (e) Applicability of Law of conservation of energy for free fall (e) how distance traveled per second varies

## Work done by a force

Work done by a force – In Physics Work is done by a force only if the object on which the force is applied makes a displacement. Without this displacement, work done is zero irrespective of the force applied. Work done by a force depends on the 3 parameters: (a) the force applied (b) The […]

## Mechanical Advantage of a Lever with Formula

The mechanical advantage of a lever is the ratio of the load the lever overcomes and the effort a person or system applies to the lever to overcome some load or resistance. In simple words and as per the formula, it’s the ratio of load and effort. The formula of the mechanical advantage(MA) of a lever […]

Scroll to top
error: physicsTeacher.in