A cyclist rides 400 m up a slope in 80 s.
She then rides down the slope in 20 s.
What is her average speed for the whole journey?
5.0 m/s5.0\text{ m/s}5.0 m/s
8.0 m/s8.0\text{ m/s}8.0 m/s
12.5 m/s12.5\text{ m/s}12.5 m/s
20 m/s20\text{ m/s}20 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.