Two students, Amara and Leo, want to estimate the average speed of a toy car rolling down a wooden ramp.
Amara measures the length of the ramp by lining up plastic building blocks end-to-end.
She records:
'Length = 24 blocks'
Leo estimates the time taken for the toy car to travel this distance by reciting a short nursery rhyme repeatedly at what he feels is a steady pace.
He records:
'Time = 3 recitations'
Give three ways the students could improve their experimental procedure to obtain a more accurate value for the speed of the car.
53 exam-style questions on Edexcel GCSE Physics 2.2 Speed, velocity and acceleration. Each one has a worked solution and a mark scheme showing where the marks go.