Question

0.05 kg bullet is fired to the north from a 4.0 kg rifle that is initially at rest. The
bullet leaves the rifle with a momentum of 20 Ns. Determine the total momentum of the bullet-and-rifle before the bullet is fired?

Answer 1

Answer:

20 Ns

Explanation:

Using momentum conservation principle.

Total momentum before = total momentum after

MaVa + MbVb = M1V1 + MbVb

0 = M1V1 + M2V2

0 = 20 + M2V2

M2V2 = 20Ns

Total momentum = 20Ns