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CAIE A-Level Physics 2.1.2 Graphical Representation of Motion

Practise sketching and interpreting motion graphs, reading gradients, areas, turning points and signs, and translating them into physical descriptions with units.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Use distance, displacement, speed, velocity or acceleration graphs to represent motion and identify the relevant axes and features.
  • Read or interpret gradient, area, turning point and sign information from a motion graph.
  • Translate a graph into a physical description with correct direction, units and time interval.

2.1.2—Distance, displacement, speed, velocity and acceleration question 1

[Maximum number: 1]

A child on a sledge slides down a steep hill and then travels in a straight line up an ice-covered slope, as illustrated in Fig. 3.1.

Fig. 3.1 (not to scale)

Fig. 3.1 (not to scale)

The sledge passes point A with speed 18 ms−118 \mathrm{~ms}^{-1} at time t=0 and then comes to rest at point B. The child applies a brake to the sledge at point B. The brake does not keep the sledge stationary and it immediately slides back down the slope towards A .

The variation with time t of the velocity v of the sledge from t=0 to t=24 st=24 \mathrm{~s} is shown in Fig. 3.2.

Fig. 3.2

Fig. 3.2

State the time taken for the sledge to travel from A to B .
time =

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