A machine gun fires 10 bullets/s, each of mass 10g, the speed of each bullet is 20 cms⁻¹, then force of recoil is

Options

(a) 200 dyne
(b) 2000 dyne
(c) 20 dyne
(d) None of these

Correct Answer:

2000 dyne

Explanation:

Time taken for 1 bullet = 1/n
Force = the rate of change of momentum = mvn
= 10 x 20 x 10 = 2000 dyne