Advertisements
Advertisements
प्रश्न
If the speed of a body is halved, what will be the change in its kinetic energy?
उत्तर
Kinetic energy of a body is directly proportional to the square of velocity. So, the kinetic energy will become `(1/4)` the initial kinetic energy when velocity is halved .
APPEARS IN
संबंधित प्रश्न
The kinetic energy of an object of mass m moving with a velocity of 5 m s−1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?
When a boy doubles his speed, his kinetic energy becomes
On what factors does the kinetic energy of a body depend?
How fast should a man of 50 kg run so that his kinetic energy be 625 J?
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.
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?
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
An apple falling from a tree is an example for kinetic energy.
