3. A cannon of mass 600 kg lies on a rough horizontal surface and is used to fire a 3 kg shell horizontally at \(200 \mathrm {~ms} ^ { - 1 }\).
- Find the impulse which the shell exerts on the cannon.
- Find the speed with which the cannon recoils.
Given that the coefficient of friction between the cannon and the surface is 0.75 ,
- calculate, to the nearest centimetre, the distance that the cannon travels before coming to rest.