Question

14) From a rifle of mass 6 kg a bullet of mass 60 gram is fired with an initial velocity of 38 metre
per second Calculate the recoil velocity of the rifle​

Answer 1

Answer:

0.38 m/s

Step-by-step explanation:

according to law of conservation of momentum

momentum of bullet = momentum of rifle           ------(1)

For Rifle

   mass of rifle = 6kg

   velocity of rifle = x

   momentum of rifle = 6x kg·m/s

For Bullet

   mass of bullet = 60gram = 60/1000 = 0.06kg

   velocity of bullet = 38m/s

   momentum of bullet = 38*0.06 = 2.28 kg·m/s

6x = 2.28                  [from ( 1 )]

x = 2.28/6

x = 0.38m/s