Question

7. A rifle of mass 6 kg, fires a bullet of mass 20 g with
velocity of 50 ms -1 Calculate the initial recoil velocity of the rifle

Answer 1

Answer:

down......

Explanation:

Here,

we can take any change of momentum. At rest the momentum of the bullet was 0.But after the fire the momentum is .....

$50 \times \frac{20}{1000} = 1$

so the change in momentum is 1kgm/s. So the change in momentum will be the same as 1......

The velocity of the rifle would be...

$v = \frac{1}{6}$

the direction of the velocity of the rifle is opposite to the bullet