A machine gun with a mass of 5kg fires a 50g bullet at speed of 100ms-1. The recoil speed of the machine gun is
A
0.5 msec-1
B
1.5 msec-1
C
1 msec-1
D
2 msec-1
E
4 msec-1
Verified Correct Answer: C.
Physical Principles & Numerical Solution
Gun momentum = bullet momentum
5 x v = 0.05 x 100
v = 1 msec-1
Source: Myschool Past Questions Archive (Record #29240)