(a(i))[1]
Suggest a measuring device that the student uses to make sure that $AB$ and $CD$ are $120.0\,\text{cm}$ apart.
(a(ii))[1]
Suggest a measuring device that the student uses to make sure that the ramp is at an angle of $30^\circ$ to the bench.
(b(i))[1]
Suggest one reason why there is a large variation in these times.
(b(ii))[1]
On Fig. 2.2, show the position of the trolley after it has moved $120.0\,\text{cm}$.
(b(iii))[1]
Calculate the average time $t_{AV}$ taken by the trolley to cover a distance $d = 120.0\,\text{cm}$.
(c)[2]
Calculate the acceleration $a$ of the trolley down the ramp using the equation $a = \frac{2d}{t_{AV}^2}$. Give the unit of your answer.
(d)[1]
Suggest how the student could change the experiment to obtain a more accurate value of the trolley acceleration $a$.