A student wants to determine the average speed of a toy electric car travelling down a school corridor of length approximately 15 m.
The student needs to measure:
Which combination of measuring instruments is most suitable?
Distance: 30 cm30\text{ cm}30 cm ruler; Time: analogue wall clock
Distance: 30 cm30\text{ cm}30 cm ruler; Time: stopwatch
Distance: measuring tape; Time: analogue wall clock
Distance: measuring tape; Time: stopwatch