A bullet moving with a velcity u passes through a plank which is free to move. The two are of equal mass. After pssing through the plank, the velocity of the bullet becomes `fu`. Its velocity relative to the plank now is

A bullet of mass 10gm moving with a horizontal velocity 100m//s passes through a wooden block of mass 100gm . The block is resting on a smooth horizontal floor. After passing through the block the velocity of the bullet is 10m//s the velocity of the emerging bullet with respect to the block is .

A bullet of mass 'm' moving with velocity 'u' passes through a wooden block of mass M = nm as shown in figure. The block is resting on a smooth horizontal floor. After passing through the block, velocity relative to the block is .

A bullet of mass 'm' moving with velocity 'u' passes through a wooden block of mass M = nm as shown in figure. The block is resting on a smooth horizontal floor. After passing through the block, velocity relative to the block is .

A bullet losses 1/6 of its velocity in passing through a plank. What is the least number of planks required to stop the bullet ?

A bullet loses 1//20 of its velocity on passing through a plank. What is the least number of planks that are required to stop the bullet ?

A bullet loses 1//2th1 of its velocity is passing through a plank. What is the least number of planks required to stop the bullet ?