Physics (AS & A Level) · Oct / Nov 2020 · Paper 21 · Question 2

A small block is lifted vertically upwards by a toy aircraft, as illustrated in Fig. 2.1. velocity aircraft string block Fig. 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. 1.96 –6.86 0.20 t / s v / m s–1 0 0.90 0 0.90 Fig. 2.2 Air resistance is negligible.

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