Advertisements
Advertisements
Question
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
Advertisements
Solution
- The energy of a body in motion is called its kinetic energy.
- It is defined as follows:
Kinetic energy of a body is the energy possessed by it due to its state of motion. Actually, it is the work done on the body bringing it to the state of motion. - In short form, it is written as K.E. or K.
- Example: In a swinging pendulum moving to and fro, the bob has the kinetic energy.

APPEARS IN
RELATED QUESTIONS
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.
Calculate the work required to be done to stop a car of 1500 kg moving at a velocity of 60 km/h?
Write the expression for the kinetic energy of a body explaining the meaning of the symbols used.
A cannon ball of mass 500 g is fired with a speed of 15 m s-1. Find:
- its kinetic energy.
- its momentum.
Write an expression for the kinetic energy of a body of mass m moving with a velocity v.
Two objects having equal masses are moving with uniform velocities of 2 m/s and 6 m/s respectively. Calculate the ratio of their kinetic energies.
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
Find out the form of energy possessed by the following thing.
Water falls
When stored water falls down, potential energy of water is converted into ______.
A body starts from rest and is acted on by a constant force. The ratio of kinetic energy gained by it in the first five seconds to that gained in the next five-second is:
