A dise of mass 10 g is kept floating horizontally by throwing 10 marbles per secound against it from below . If mass of each marble is 5 g Calculate the velocity with which marbles are striking the disc . Assume that marbles strike the disc . Normally and rebound downwards with the same speed.

A disc of mass 10 g is kept floating horizontally by throwing 10"marbles"//"second" against it from below.If the mass of each marble is 5 g , the velocity with which marbles are striking the disc (the marbles strike the disc normally and rebound downward with the same speed)

A disc of mass 10 gm is kept horizontally in air by firing bullets of mass 5 g each at the rate of 10//s. If the bullets rebound with same speed. The velocity with which the bullets are fired is -

A disc of mass 100 g is kept floating horizontally in air by firing bullets, each of mass 5 g with the same velocity at the same rate of 10 bullets per second. The bullets rebound with the same speed in opposite direction. Find the velocity of each bullet at the time of impact.

A solid disc of mass M is just held in air horizontally by throwing 40 stones per sec vertically upwards to strike the disc each with a velocity 6 ms^(-1) . If the mass of each stone is 0.05kg what is the mass of the disc (g=10ms^(-2))

A disc of mass 10 g is kept floating horizontal in the air by firing bullets, each of mass 5g, with the same velocity at the same rate of 10 bullets per second. The bullets rebound with the same speed in positive direction . The velocity of each bullet at the time of impact is (Take g = 9.8 ms^(-2))

A metre scale of mass M is standing vertically on a horizontal table on one of its ends. It now falls on the table without slipping. The velocity with which the free end of the metre scale strikes the table is [Given : I=(ML^(2))/(3) and g=10 m//s^(2) ]

[" A disc of mass "5kg" and kept "],[" floating horizontally in mid air "],[" by firing "10" bullets per second "],[" vertically up.If the mass of "],[" each bullet is "50gm" and bullets "],[" rebounded with same speed,"],[" the speed of each bullet is "],[m/" sec "(g=10m/sec^(2))]

A bullet of mass 10 gram is fired horizontally into a 5 kg wooden block at rest on a horizontal surface The coefficient of kinetic friction between the block and the surface is 0.1 Calculate the speed of the bullet striking the block if the combination moves 20 m before coming rest .

A disc of mass 100 g is rolling without slipping on a horizontal surface with a velocity of 10 cm s^(-1) . Calculate its total energy.

500 steel ballls each of mass 1 gram strike normally one sq. cm area of a metal plate per second, with a velocity of 10 m/s and rebound with the same velocity. What is the pressure exerted by the balls on the surface of the plate?