Question

Bullet having mass 500 gram is moving with 400 metre per second it is stopped in 1 microsecond find the average force acting on the bullet​

Answer 1

By using Newton's second law of motion it can be found.

Solution is in the attachment

Answer 2

500/1000=0.400/10^6

200000/-1000/10^6

=-200×10^6

here is retardation