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GCSE Questions: Forces

Q5. A child drops a ball. The ball hits the ground and bounces.

The graph is a velocity-time graph for the ball from t = 0.0s, when the ball was dropped, until t = 1.2s, when the ball reaches the top of its first bounce. Air resistance has been ignored.

(a) Describe the motion of the ball between points A and B on the graph.

[3 marks]

(b) In what direction is the ball moving between points C and D on the graph?

[1 mark]

(c) The ball and the Earth form a system.

What is meant by 'a system'?

Tick one box in the table below to answer.

Statement Tick here
A group of objects that interact.
 
Objects with big differences in mass.
  
Objects with gravitational potential energy.
  

[1 mark]

(d) When the ball hits the ground, energy is transferred from the ball to the Earth.

Explain how the data in the graph shows this energy transfer.

[4 marks]

[9 Marks TOTAL]