O-LevelPhysicsForcesOct/Nov 2024Paper 4 Q314 Marks
A student does an experiment to find the mass of a metre rule. (a) A fixed mass is placed on the metre rule at the 5.0 cm mark as shown in Fig. 3.1. [Figure 3.1] The student: • places the pivot below the 25.0 cm mark on the metre rule • places a mass of mass m = 20g on the metre rule • adjusts the position of the 20g mass until the rule is as close to balance as possible.
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