Question

A dish of mass 'm' gram is held floating in air by firing bullets each of mass 'm/10' gram vertically from below at the rate of 'n' bullets per second. If the bullets rebound with the same magnitude of the velocity with which it hits the disc, then magnitude of the velocity with which bullets hits the dish is_____

Answer 1

Answer:

100/ n is the correct answer

Explanation:

$mg \: = v \frac{m}{10}n$

hope the answer will help you

Answer 2

Explanation:

F= d(mv)/dt. i.e. rate of change of momentum

F = 2mv*n

Mg=2(M/10)*v*n

v= 5g/n