Question

A bullet of mass 20gm is fired from a gun of mass 8kg with a velocity of 400m/s, calculate the recoil velocity of gun

1 m/s

2 m/s

-1 m/s

-2 m/s


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Answer 1

Answer:

1 m/s

Explanation:

:This is based on the conservation of momentum, according to this the momentum of bullet should be equals to momentum of gun. P bullet = P gunP= mvMass of bullet is 20 gm= 0.02 kg , velocity= 400m/secMass of gun = 8kg, and let velocity is V So, 0.02×400 = 8×VSo, V= 1 m/secThis is the recoil velocity of gun.Sep

Answer 2

This is based on the conservation of momentum, according to this the momentum of bullet should be equals to momentum of gun.

Pbullet = Pgun

P= mv

Mass of bullet is 20 gm= 0.02 kg , velocity= 400m/sec

Mass of gun = 8kg, and let velocity is V

So, 0.02×400 = 8×V

So, V= 1 m/sec

This is the recoil velocity of gun.