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
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 ball of mass M is moving with a speed v. What is its kinetic energy?
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 body is thrown vertically upwards. Its velocity keeps on decreasing. What happens to its kinetic energy as its velocity becomes zero?
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?
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.
Which of the following does not posses the ability to do work not because of motion?
The kinetic energy of a body of mass 4 kg and momentum 6 Ns will be
