Question

Find the average recoil force on a machine gun that is firing 150 bullets per minutes, each with a speed of 900 ms-1.mass of each bullet is 12 g.

Answer 1

Answer:

Average force = change in the total momentum / time taken

In one minute, 150 bullets of 12g are shot at 900m/s

Total change in the momentum = 150 x 0.012kg x 900 = 1620kgm/s

Time taken = 1min = 60s

Average force = 1620/60 = 27N

Average recoil force is 27N