- Kinetic Energy
undefined Work and Energy video tutorial00:13:05
Certain force acting on a 20 kg mass changes its velocity from 5 m s−1 to 2 m s−1. Calculate the work done by the force.
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.
An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?
The kinetic energy of an object of mass, m moving with a velocity of 5 m s−1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?