1409 Words6 Pages

Physics Lab Report: Parallel Force
Aim: To test the principle of moments.
Apparatus: Metre rule with holes drilled at the 25cm, 50cm and 75cm mark, 50g masses
50mm long bolt with a diameter of approximately 5mm, retort stand, boss head and clamp, 0-10 N spring balance, electronic pan balance ,wire or string for suspending masses from the metre rule, two bulldog clips.
Part A: Balancing a constant moment.
Procedure:
1. The experiment is set up by first placing the bolt through the rule, then the bolt is clamped with the boss-head. The rule must be ensured that it is balances horizontally before adding any weights.
2. The height of the pivot is adjusted so that when the rule is balanced the weights are a few centimeters above the*…show more content…*

The difference between anticlockwise moment and clockwise moment increases when the mass used at the fixed distance increases. 3. Clockwise moment is equals to anticlockwise moment. 4. It is because the pivot point is on the center of the mass of the rule. The mass is cancelled off as the lever distance is 0. 5. The length of the lever arm for the clockwise moment has to be increased as more weights at the fixed distance to the left of the pivot increases. This is because when more weights are added, the anticlockwise moment increases. To achieve equilibrium, anticlockwise moment must equals to clockwise moment. So at the clockwise moment where the mass is constant, the length must be increased so that the clockwise torque produced can balance the anticlockwise torque. Part C: Weighing metre rule

The difference between anticlockwise moment and clockwise moment increases when the mass used at the fixed distance increases. 3. Clockwise moment is equals to anticlockwise moment. 4. It is because the pivot point is on the center of the mass of the rule. The mass is cancelled off as the lever distance is 0. 5. The length of the lever arm for the clockwise moment has to be increased as more weights at the fixed distance to the left of the pivot increases. This is because when more weights are added, the anticlockwise moment increases. To achieve equilibrium, anticlockwise moment must equals to clockwise moment. So at the clockwise moment where the mass is constant, the length must be increased so that the clockwise torque produced can balance the anticlockwise torque. Part C: Weighing metre rule

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