O-LevelPhysicsKinematics5054/21 · May/June 2018 · Q16 Marks
A cyclist travels along a straight, horizontal road, as shown in Fig. 1.1. [Figure 1.1]
- (a)Describe how the average speed of the cyclist can be measured. In your account, suggest what equipment is used, the measurements that are made and how the average speed is calculated.[3]
- (b)(i)State what is meant by a negative acceleration.[1]
- (b)(ii)The size of the acceleration is 1.8m/s². Calculate the change in speed of the cyclist in a time of 2.5s. change in speed = ................................................................[2][2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.
- [B1] distance measured (between 2 marks) with metre rule or tape measure
- [B1] time measured (between 2 marks) with stopwatch/stopclock / timer
- [B1] (average speed =) (total) distance / time
- [B1] decrease in speed or deceleration
- [C1] (Δv =) a x t in any form numerical or algebraic
- [A1] 4.5 m/s
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