Ball 1 collides with another ball of same mass at rest. For what value of coefficient of restitution e, the velocity of second becomes two times that of 1 after collision?

A steel ball of mass m is initially at rest on a horizontal frictionless surface. It is struck head on by another steel ball of mass 2m travelling with a velocity of 50 cm/s. Calculate the velocities of the two balls after a collision assuming it to be elastic.

A body of mass 2 kg makes an elastic collision with another body at rest and continues to move in the original direction at a speed equal to 1/3 of its original speed. The mass of the second body is

A cricket ball of mass 250 g collides with a bat with velocity of 10 m/s and returns with the same velocity in 0.01s. The force acting on the bat is

A body of mass 2 kg moving with a velocity of 6 m/s strikes inelastically another body of same mass at rest . The amount of heat evolved during collision is

A ball is projected horizontally with a velocity of magnitude 5 m/s. Find its position after 1/4 sec:

A ball is dropped from a bridge at height of 176.4m over a river. After 2 seconds a ball is thrown straight downwards. What should be the initial velocity of the second ball so that both hit the water simultaneously.

A body A starts from the rest with an acceleration a_1 . After 2 second another body B starts from rest with an acceleration a_2 . If they travel equal distance in the 5th second after the start of A, then what will be the ratio a_1 : a_2 .

What is the value of acceleration due to gravity on the surface of the moon ? Given that the mass of the moon is 1//80 times that of the earth and diameter of the moon is 1//4 times that of earth (g=9.8m//s^2) .