Question

A hunter has a machine gun that can fire `50g` bullet with a velocity of `150m//s`. A `60kg` tiger springs at him with a velocity of `10m//s`. How many bullets must the hunter fire per second into the tiger in order to stop him in the track?

Answer 1

Let `n` bullets be fired per second.
To stop the tiger in his track, rate of change of momentum of bullets= rate of change of momentum of tiger
`n(50xx10^(-3))xx150=60xx10`
`n=(60xx10)/(50xx10^(-3)xx150)=80`.