A student walks 300 m in 60 s, stops for 30 s and then runs 180 m in 30 s.
What is the student's average speed for the whole journey, including the stop?
2.5 m/s2.5\ \mathrm{m/s}2.5 m/s
4.0 m/s4.0\ \mathrm{m/s}4.0 m/s
5.3 m/s5.3\ \mathrm{m/s}5.3 m/s
5.5 m/s5.5\ \mathrm{m/s}5.5 m/s
96 exam-style questions on Edexcel GCSE Physics 2.2 Speed, velocity and acceleration, covering 2.2.1 Speed and distance–time graphs, 2.2.2 Acceleration and the uniform-acceleration equation, 2.2.3 Velocity–time graphs, and 2.2.4 Measuring speed, typical speeds and free-fall acceleration. Each one has a worked solution and a mark scheme showing where the marks go.