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
Correct Answer: Option C
Explanation
Gun momentum = bullet momentum
5 x v = 0.05 x 100
v = 1 msec-1