Advertisements
Advertisements
प्रश्न
What do you understand by the kinetic energy of a body?
Advertisements
उत्तर
Kinetic energy is the energy that a body possesses because of its motion. It is directly proportional to the mass and the square of the velocity of the moving body.
K.E = `1/2 m v^2`
APPEARS IN
संबंधित प्रश्न
What is the kinetic energy of an object?
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
State two factors on which the kinetic energy of a moving body depends.
Two toy-cars A and Bof masses 200 g and 500 g respectively are moving with the same speed. Which of the two has greater kinetic energy?
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.
By how much will the kinetic energy of a body increase if its speed is doubled?
Write an expression for the kinetic energy of a body of mass m moving with a velocity v.
If the speed of a body is halved, what will be the change in its kinetic energy?
A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
A bullet of mass 15 g has a speed of 400 m/s. What is its kinetic energy? If the bullet strikes a thick target and is brought to rest in 2 cm, calculate the average net force acting on the bullet. What happens to the kinetic energy originally in the bullet?
Which of the following does not posses the ability to do work not because of motion?
Derive the formula for the kinetic energy of an object of mass m, moving with velocity v.
Find out the form of energy possessed by the following thing.
A rolling ball
The energy possessed by a cricket ball bowled by a player is ______.
When stored water falls down, potential energy of water is converted into ______.
What is energy of motion? Give examples.
When the speed of a moving object is doubled, then its kenetic energy ______.
When a bell fixed on a cycle rings, then the energy conversion that takes place is ______.
