Question

A bomb of mass 20 kg is moving with a velocity of 10 ms on a straight path and suddenly explodes into two fragments. One moves in the same direction with velocity of 40 ms and other in
opposite direction with velocity of 20 ms-1. Find the magnitude of the masses.​

Answer 1

Explanation:

Stationary so initial momentum will be zero. 

momentum of 2kg is P1=2×8=16kgm/s

that if 1kg is P2=1×12=12kgm/s

both being at right angle so their resultant will be P=P12+P22=256+144=20kgm/s

the third should have same momentum  but in opposite direction to make the net momentum zero.

Now its velocity should be  V=mP=0.520=40m/s

bro same model