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Questions on Forces

Q9.

Xander sits on a mat at the top of a helter-skelter and then slides down a chute around the outside.


(a)

(i)      Name two of the forces acting on Xander as he slides from point A to point B.

2 marks

(ii)     As Xander slides from point A to point B, the forces acting on him are balanced. Describe Xander's speed when the forces acting on him are balanced.

1 mark

(b)     Xander goes back for a second go.  This time he sits on a smooth cushion instead of a mat. He goes much faster on the cushion.  Give the reason for this.

1 mark

(c)     On his third go Xander lies back on the cushion with his arms by his side.
          What happens to his speed?  Give the reason for your answer.

2 marks
Maximum 6 marks