A person holding a rifle (mass of person and rifle together is 100 kg ) stands on a smooth surface and fires 10 shots horizontally, in 5 s. Each bullet has a mass of 10 g with a muzzle velocity of 800 m/s. The final velocity acquired by the person and the average force exerted on the person are

1.A person holding a rifle (mass of person and rifle together is 100 kg ) stands on a smooth surface and fires 10 shots horizontally, in 5 s. Each bullet has a mass of 10 g with a muzzle velocity of 800 m/s. The final velocity acquired by the person and the average force exerted on the person are

A) -0.8 m/s, 16 N
B) -0.8 m/s, 8 N
C) -1.6 m/s, 16 N
D) -1.6 m/s, 8 N