#### A machine gun fires 60.0 gram bullets at 6 bullets a second. If the velocity of the bullets is 600 m/s, then the average force on the machine gun is   Option 1) 67.0 N Option 2) 75.0 N. Option 3) 94.0 N Option 4) 216 N.

As learnt in

Perfectly Elastic Collision -

Law of conservation of momentum and that of Kinetic Energy hold good.

- wherein

We have, 0.06 kg / bullet x 6 bullet / second = 0.36 kg / sec

Average force = 0.36 kg/ sec x 600 m / sec = 216 kg ms-2

= 216 N

Option 1)

67.0 N

This option is incorrect

Option 2)

75.0 N.

This option is incorrect

Option 3)

94.0 N

This option is incorrect

Option 4)

216 N.

This option is correct