Advertisements
Advertisements
प्रश्न
What is the kinetic energy of an object?
Advertisements
उत्तर
Kinetic energy is the energy that an object has because of its motion. The kinetic energy of an item moving at a specific velocity equals the effort required to attain that velocity.
The energy an object possesses due to its motion is called kinetic energy.
Kinetic energy (ke) = `1/2 mv^2`
Where m = mass of the object
v = velocity of the object
APPEARS IN
संबंधित प्रश्न
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
Kinetic energy = 1/2 × mass × ............
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.
A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the ground? (g = 9.8 m/s2)
Two objects having equal masses are moving with uniform velocities of 2 m/s and 6 m/s respectively. Calculate the ratio of their kinetic energies.
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)
What do you understand by the kinetic energy of a body?
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?
Water stored in water dams possesses kinetic energy.
