Physics 5054/31 — May/June 2017
Cambridge O-Level · Practical Test · worked solutions for every part, with the mark scheme
Topics Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation · Planning Experiments and Investigations
In this experiment, you will investigate the time taken for a mass to rotate on the end of a wire.
You are provided with
- a stopwatch,
- a length of wire,
- a mass hanger with a pointer,
- seven slotted masses,
- safety glasses,
- a stand, boss and clamp to hold the wire and mass set.
The Supervisor has set up the apparatus as shown in Fig. 1.1 with all seven slotted masses on the mass hanger. You must wear the safety glasses throughout this experiment.
Observe the position of the pointer when the mass is at rest.
By pushing against the end of the pointer, rotate the mass through two complete revolutions in a clockwise direction as shown in Fig. 1.2.
When released the mass rotates in an anticlockwise direction until it stops for the first time. It then rotates in a clockwise direction.
Determine an accurate time for the mass to rotate from this initial position until it stops for the first time.
= ______
Remove six slotted masses from the mass hanger. Repeat (a) to determine the new time .
= ______
Calculate .
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