Question

A bullet of mass 20
g is fired from a gun with a muzzle velocity 100
ms−1
. Find the recoil of the gun if its mass is 5
kg.

Answer 1

Answer:

0.2 m/s

Explanation:

By the law of conservation of momentum,

Initial momentum = find momentum

∴P

1

=P

2

∴m

1

v

1

=m

2

v

2

here, m

1

=20gm.v

1

=200ms

−1

,m

2

=20kg=20,000gm

∴v

2

=

m

2

m

1

v

1

=

20,000

20×200

∴

v

2

=0.2

m/s

Answer 2

The answer is in the attachment

hope it helps: )