GCSE Questions: Forces

Q13. The diagram shows one type of cannon.

(a) When the cannon is fired, there is an explosion inside the barrel. The explosion causes the cannon ball to move forwards and the cannon to move backwards.

Explain, using the idea of momentum, why the cannon moves backwards after firing.

[3 marks]

(b) When the cannon is fired, the cannon ball accelerates at 2500 m/s2 for 0.05 seconds. The cannon ball has a mass of 8 kg.

Calculate the momentum of the cannon ball 0.05 seconds after the cannon is fired.

[4 marks]

[7 Marks TOTAL]