Physics (AS & A Level) · May / June 2025 · Paper 52 · Question 1

A thin solid disc of radius r and thickness z is attached to a thin axle. String is wrapped around the axle, as shown in Fig. 1.1. string axle disc block r z Fig. 1.1 A block of mass m is attached to the string. The block is released from rest and falls downwards. The block has speed v when it has fallen through a distance h from the point of release. The value of v is determined using one light gate connected to a timer. It is suggested that v is related to m by the relationship h v 2 = πr 2z 2PQm + 1 P where P and Q are constants. Plan a laboratory experiment to test the relationship between v and m. Draw a diagram showing the arrangement of your equipment. Explain how the results could be used to determine values for P and Q. In your plan you should include: • the procedure to be followed • the measurements to be taken • the control of variables • the analysis of the data • any safety precautions to be taken. 3 Diagram 4 [15]

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