A straight service tunnel is 420 m long. An inspection vehicle enters the west end and travels east at a constant speed of 6.0 m/s. A repair vehicle enters the east end 20 s later and travels west at a constant speed of 9.0 m/s. Both vehicles continue without stopping.
How far has the repair vehicle travelled when it meets the inspection vehicle?
252 m252\ \mathrm{m}252 m
180 m180\ \mathrm{m}180 m
120 m120\ \mathrm{m}120 m
300 m300\ \mathrm{m}300 m
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.