(a(i))[1]
Write the time shown on the line beside each stop-watch.
(a(ii))[2]
Calculate the mean time for the trolley to travel down the slope.
(a(iii))[1]
The students want the same trolley to spend more time rolling down the plank. Suggest how they should change the arrangement in Fig. 2.1.
(b)[3]
Calculate the average speed of the trolley.
(c)[3]
Calculate the distance travelled by the trolley from time = $0$ to time = $4.0\text{ s}$.