O-LevelPhysicsForcesOct/Nov 2025Paper 3 Q314 Marks
In this experiment you will use a balancing method to determine the mass of a metre rule. You have been provided with: • a metre rule with a millimetre scale • a triangular block to act as a pivot • slotted masses making a total of 100 g. (a) Place the metre rule on the pivot. Place a mass m = 20g on the metre rule with its centre at the 5.0 cm mark. Adjust the position of the metre rule on the pivot until the metre rule is as close to balance as possible. The mass must stay at the 5.0 cm mark. [Figure 3.1] shows the balanced metre rule. [Figure 3.1]
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