A small block is lifted vertically upwards by a toy aircraft, as illustrated in Fig. 2.1.
[Figure 2.1]
As the block is moving upwards, the string breaks at time t = 0. The block initially continues moving upwards and then falls and hits the ground at time t = 0.90 s. The variation with time t of the velocity v of the block is shown in Fig. 2.2.
[Figure 2.2]
Air resistance is negligible.

Q: What topic does this question test?

This question tests Kinematics in A-Level Physics (syllabus code 9702). It is worth 9 marks.

Q: Which exam paper is this question from?

This question appeared in the Cambridge A-Level Physics Oct/Nov 2020 examination, Paper 2 Variant 1 (9702_w20_qp_21.pdf).

Question

A small block is lifted vertically upwards by a toy aircraft, as illustrated in Fig. 2.1.
[Figure 2.1]
As the block is moving upwards, the string breaks at time t = 0. The block initially continues moving upwards and then falls and hits the ground at time t = 0.90 s. The variation with time t of the velocity v of the block is shown in Fig. 2.2.
[Figure 2.2]
Air resistance is negligible.

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