A 20g bullet moving at 200 meter per second hits a bag of sand and comes to rest in 0.011secs.What is the momentum of the bullet just before hitting the bag?Find the average force that stopped the bullet.

Answer 1

momentum = mass * velocity ... kg•m/s

acceleration = v / t = 200 m/s / 11 ms ... m/s^2

force = mass * acceleration = .02 kg * (200 m/s / 11 ms) ... N