A girl with mass 35 kg is riding a bicycle, starts from rest and moves downhill in a straight line. She does not pedal. Fig. 1.1 indicates that the slope has a constant gradient.
(a)[2]
Calculate the resultant force acting on the girl when her acceleration is $2.6\,\text{m s}^{-2}$.
(b(i))[2]
On Fig. 1.2, sketch a speed-time graph from the moment the girl begins to move until she is moving at a constant speed.
(b(ii))[1]
State how the distance travelled can be obtained from a speed-time graph.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Uses equation F = ma or calculation 35 \times 2.6” …