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`
संबंधित प्रश्न
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
The energy of a flying kite is kinetic energy.
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
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?
Write the expression for the kinetic energy of a body explaining the meaning of the symbols used.
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.
Two bodies have masses in the ratio 5 : 1 and their kinetic energies are in the ratio 125 : 9. Calculate the ratio of their velocities.
Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?
How fast should a man of 50 kg run so that his kinetic energy be 625 J?
What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?
A body of 2 kg falls from rest. What will be its kinetic energy during the fall at the end of 2 s? (Assume g = 10 m/s2)
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?
Explain the difference between potential energy and kinetic energy.
What are the uses of mechanical energy?
Explain the types of mechanical energy.
The energy possessed by a cricket ball bowled by a player is ______.
What is energy of motion? Give examples.
The kinetic energy of a body of mass 4 kg and momentum 6 Ns will be
When the speed of a moving object is doubled, then its kenetic energy ______.
