Question

A bullet of mass 50 g is fired from a gun of mass 1 kg. If velocity of the bullet is 400 m/s then

calculate the recoil velocity of the gun.​

Answer 1

Answer:

20m/s

Explanation:

mass of bullet=50g

velocity=400m/s

mass of gun=1kg=1000g

recoil velocity=?

according to conservation of momentum

400x50=1000×x

or, x=400×50/1000

=20

hence the answer is 20m/s

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Answer 2

Answer:

Recoil velocity of the gun is 20 m/s.

Explanation:

Given;-

         Mass of bullet, m = 50 g

      Velocity of bullet, v = 400 m/s

         Mass of gun, M = 1 kg

Let the recoil velocity of the gun be 'Vg'.

We know by formula that;-

        Recoil Velocity, Vg = mv/M

So, putting the given values in the formula, we get;-

                Vg = 50 × 400/ 1000 × 1

                Vg = 20000/ 1000

                Vg = 20 m/s

Therefore, the recoil velocity of the gun is 20 m/s.

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