1.	(a)	Megan was doing time-trials on her bike around a 400 metre horizontal track.
(i)	She took 32 seconds to travel 400 m.
What was her average speed? Give the unit.
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1 mark
(ii)	Compare the forward force on the bike with the backward force on the bike when Megan was travelling at a constant speed.
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1 mark
(b)	Megan then crouched down over the handlebars to make herself more streamlined, as shown below.
She continued to pedal with the same force as before.

	Compare the forward and backward forces on Megan and her bike now.
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1 mark
	Explain your answer.
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1 mark
maximum 4 marks