bullet 0.1 kg flying at 30 m/s hit a stick 1 kg and move it , in which speed the stick will move ??

Answer 1

Conservation of Momentum MUST BE Obeyed-:

Mass1 x Velocity1 = Mass2 x Velocity2

0.1 x 30 = 1 x Velocity2

3 = 1 x Velocity2

Velocity2 = 3 m s^-1 (Stick moves at 3 metres per second)