Advertisements
Advertisements
प्रश्न
Write an expression for the kinetic energy of an object.
उत्तर
If a body of mass m is moving with a velocity v, then its kinetic energy Ek is given by the expression,
`E_k=1/2 mv^2`
Where, m = mass of the object
v = velocity of the object
APPEARS IN
संबंधित प्रश्न
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.
When a boy doubles his speed, his kinetic energy becomes
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
A ball of mass M is moving with a speed v. What is its kinetic energy?
Give reasons for the following A horse and a dog are running with the same speed. Which one of them has more kinetic energy than the other.
A body of mass 60 kg has the momentum 3000 kg m s-1. Calculate:
- the kinetic energy.
- the speed of the body.
A body falls freely under gravity from rest. Name the kind of energy it will possess on reaching the ground.
How fast should a man of 50 kg run so that his kinetic energy be 625 J?
An apple falling from a tree is an example for kinetic energy.
What are the uses of mechanical energy?
