Theory: answer all nine questions. Show working and appropriate units; diagrams and alternative valid methods are marked against the original scheme.
(a)(i)Fig. 1.1 shows trolley A moving into stationary trolley B; Fig. 1.2 is their speed–time graph. State how the graph shows trolley B accelerates uniformly during the collision.
Answer guidance
State A short answer. No explanation is needed, and adding one cannot earn extra marks.
[1 mark]
(a)(ii)Using Fig. 1.2, explain how trolley B has a greater acceleration magnitude than trolley A’s deceleration magnitude during the collision.
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[1 mark]
(a)(iii)From Fig. 1.2, calculate trolley B’s acceleration at t = 0.40 s, in m/s².
[2 marks]
(b)Trolley A has mass 0.80 kg and trolley B 0.60 kg. Using the collision speeds in Fig. 1.2, show that momentum is conserved.
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[2 marks]
(c)In another collision of the same trolleys at the same initial speed, the wooden rod and modelling clay in Fig. 1.1 are absent. Explain why the collision force is larger.
Answer guidance
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
[2 marks]
5054/22/M/J/24Cambridge O Level Physics 5054 · May/June 2024 · Paper 2 variant 2 · Question 1