Question

A bullet of
mass 8kg is fired with
a velocity of 8m/a calculate its
Kinetic energy​

Answer 1

Answer:

Physics

A bullet of mass 40 g is fired from a gun of mass 10 kg. If velocity of bullet is 400 m/s, then the recoil velocity of the gun will be

A

1.6 m/s in the direction of the bullet

B

1.6 m/s opposite to the direction of the bullet

C

1.8 m/s in the direction of the bullet

D

1.8 m/s opposite to the direction of the bullet

Medium

Answer

Let velocity of gun is v.

There is no external force acting, so linear momentum will conserve.

Before the firing, Linear Momentum =0

After the firing, Linear momentum =0.04×400+10×v

⇒0.04×400+10×v=0 ⇒v=−1.6m/s

Hence, 1.6m/s opposite to the direction of the bullet.