Advertisements
Advertisements
प्रश्न
A ball of mass M is moving with a speed v. What is its kinetic energy?
Advertisements
उत्तर
Kinetic energy of a ball of mass m and moving with speed v is K.E. = 1/2 Mv2
APPEARS IN
संबंधित प्रश्न
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.
If the speed of a car is halved, how does its kinetic energy change?
A bullet of mass 50 g is moving with a velocity of 500 m s−1. It penetrated 10 cm into a still target and comes to rest. Calculate:
- the kinetic energy possessed by the bullet, and
- the average retarding force offered by the target.
How fast should a man of 50 kg run so that his kinetic energy be 625 J?
A man drops a 10 kg rock from the top of a 5 m ladder. What is its speed just before it hits the ground? What is its kinetic energy when it reaches the ground? (g = 10 m/s2)
Find out the form of energy possessed by the following thing.
Water falls
An apple falling from a tree is an example for kinetic energy.
What are the uses of mechanical energy?
The energy possessed by a cricket ball bowled by a player is ______.
Water stored in water dams possesses kinetic energy.
