1a2 marks
An IGCSE student is investigating the average speed of a toy car travelling down a slope.
She releases the toy car on the slope. She uses a stopwatch to measure the time taken for the car to travel down part of the slope. Fig. 5.1 shows the slope.
(i)
Suggest a suitable length l for the slope used in this school laboratory experiment.
(ii)
Suggest a suitable height h, above the laboratory bench, for one end of the slope.
[2]
1b3 marks
The student tries to determine the time that the toy car takes to travel a distance down the slope.
Make three suggestions about what she could do to ensure that the distance travelled and the time taken by the toy car are measured as reliably as possible.
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