Advertisements
Advertisements
Question
Write an expression for the kinetic energy of a body of mass m moving with a velocity v.
Advertisements
Solution
The expression for kinetic energy is as follows :
`K.E = 1/2 mv^2`
Where,
(K.E) - Kinetic Energy
(m) - Mass
(v) - Velocity
APPEARS IN
RELATED QUESTIONS
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.
When a boy doubles his speed, his kinetic energy becomes
A car is moving with a speed of 15 km h-1 and another identical car is moving with a speed of 30 km h-1. Compare their kinetic energy.
When an arrow is shot from a bow, it has kinetic energy in it. Explain briefly from where does it get its kinetic energy?
A cannon ball of mass 500 g is fired with a speed of 15 m s-1. Find:
- its kinetic energy.
- its momentum.
A body of mass 10 kg is moving with a velocity 20 m s-1. If the mass of the body is doubled and its velocity is halved, find:
- the initial kinetic energy, and
- the final kinetic energy.
Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?
A car is accelerated on a levelled road and attains a speed of 4 times its initial speed. In this process, the kinetic energy of the car :
Explain the difference between potential energy and kinetic energy.
The kinetic energy of a given body depends on the ______.
