GCSE Questions: Momentum

Q2.

(a) An adult of mass 80 kg has more inertia than a child of mass 40 kg.

What is inertia?

[1 mark]

(b) A teacher demonstrated the idea of a 'safety surface'. She dropped a raw egg into a box filled with pieces of soft foam. The egg did not break.

The diagram shows the demonstration.

Explain why the egg is less likely to break when dropped onto soft foam rather than onto a concrete floor.

[4 marks]

A child of mass 32 kg jumped from the swing.

When the child reached the ground she took 180 milliseconds to slow down and stop.

During this time an average force of 800 N was exerted on her by the ground.

Calculate the velocity of the child when she first touched the ground.

[4 marks]

[9 Marks TOTAL]