A student lives 1.8 km from school.
Estimate the time taken for the student to walk to school.
Use a typical walking speed.
The student cycles to school instead, at a typical cycling speed.
Estimate how much time the student saves by cycling.
During a thunderstorm the student sees a flash of lightning and hears the thunder 3.0 s later.
Estimate the distance from the student to the lightning. Explain why the time taken for the light to reach the student can be ignored.
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.