Miscellaneous T...

Hailstorm are observed to strike the surface of a frozen lake in a direction making an angle of 30 c to the vertical and to rebound at an angle of 60 C to the vertical. Assuming the contact to be smooth, the coefficient of restitution is

Any heavy elastic ball falls from the ceiling of any room and after rebounding two times reaches the half of the height of ceiling. The coefficient of restitution is

A ball of 1 kg moving with velocity 7 m/sec overtakes and collides with a ball of mass 2 kg moving with velocity 1 m/sec in the same direction. If e = 3/4, the velocity of the lighter ball after impact is

A ball falls from a height h upon a fixed horizontal plane, e is the coefficient of restitution, the whole distance described by the ball before it comes to rest is

A ball of mass 8 kg and moving with velocity 4 m/sec collides with another ball of mass 10 kg moving with velocity 2 m/sec in the same direction. If the coefficient of restitution is 1/2, the velocities (in m/sec) of the balls after impact are

A sphere impinges directly on an equal sphere which is at rest. Then the original kinetic energy lost is equal to

A ball weighing 2 kg and speed 6 m/s collides with another ball of 4 kg moving in opposite direction with speed of 3 m/s. They combine after the collision. The speed of this combined mass in rn/s is

A 15 kg block is moving on ice with a speed of 5 metre per second when a 10 kg block is dropped onto it vertically. The two together move with a velocity which in metre per second is

A particle is projected with velocity 2(√2g) so that it just clear two walls of equal height 2 metre, which are at a distance of 4 metre from each other. What is the time of passing from one wall to another?

If you want to kick a football to the maximum distance the angle at which it should be kicked is (assuming no resistance)