A student releases a small metal object into a cylinder of oil. As it moves down beside a vertical ruler, a camera records its position at 1.0 s intervals, as shown in Fig. 1.1.
(a)[2]
On the grid in Fig. 1.2, draw a distance-time graph for the object.
(b(i))[2]
State and explain how a distance-time graph indicates that speed is constant.
(b(ii))[2]
Explain, in terms of the forces acting on the object, how it can fall at a constant speed.
Worked solution & mark scheme
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Correctly plotted points at (1,0.5), (2,1.6), (3,3), (4,5) and (5,7)” …