Question

If bullet of mass 10g is fires from gun of mass 10kg at rest if the velocity of bullet is 200m/s. Find the velocity of bullet with respect to ground

Answer 1

Well your question is wrong .

Find the velocity of bullet with respect to ground.

It is :

Find the velocity of gun with respect to ground.

Solution :

M1 = 10 g = 0.010 kg

M2 = 10 kg

U1 = 0

U2 = 0

V1 = 200 m/s

V2 = ?

As we know ,

M1U1+ M2U2 = M1V1+ M2V2

0 = 200×0+10×V2

0 = 2+10×V2

V2 = -2/10

V2 = -0.2 m/ s

The final Velocity of gun is -0.2 m/s