A cyclist rides 450 m up a slope in 90 s.
She then rides back down the slope in 30 s.
What is her average speed for the whole journey?
3.8 m/s3.8\text{ m/s}3.8 m/s
5.0 m/s5.0\text{ m/s}5.0 m/s
7.5 m/s7.5\text{ m/s}7.5 m/s
10 m/s10\text{ m/s}10 m/s
204 exam-style questions on CIE IGCSE Physics Motion, covering Motion. Each one has a worked solution and a mark scheme showing where the marks go.