The newest 9 of 9 written questions. Open one to see it on the real paper.
Where is the 90 N load suspended?
See it on the paper →Define the moment of a force.
See it on the paper →State two conditions for an object to be in equilibrium.
See it on the paper →The driver of the car changes a wheel. Fig. 12.2 shows a wheel nut being loosened by a spanner. 1200 N wheel nut spanner 55 cm Fig. 12.2 The driver uses a force of 1200 N on the spanner. Calculate the moment of this force on the wheel nut in Nm. moment = Nm
See it on the paper →Fig. 12.2 shows the same forklift truck after it has lowered the crate. crate Fig. 12.2 Explain why the forklift truck is more stable after it has lowered the crate. Use ideas about centre of mass in your answer.
See it on the paper →What is the order of stability of these three objects, from most stable to least stable?
See it on the paper →Compare the magnitude and the direction of forces Q and S when the train is travelling at a constant speed.
See it on the paper →The driver changes a wheel. Fig. 3.3 shows a wrench being used to loosen a wheel nut. 1000 N wheel nut wrench 45 cm Fig. 3.3 The driver applies a force of 1000 N on the wrench. Calculate the moment of this force on the wheel nut. moment = N m
Most candidates used an incorrect formula and divided the force by the distance. Some candidates omitted to convert the distance from centimetres to metres.
— Examiner report, May/June 2022, 0654/33 Q12(c) (Cambridge)
Explanations of the increased stability of the truck often involved the lowering of the centre of mass. Unsuccessful responses suggested that the centre of mass moved to the ground.
— Examiner report, May/June 2022, 0654/43 Q12(b) (Cambridge)
A common misconception was that Q must be greater than S if the train is moving at a constant speed.
— Examiner report, May/June 2021, 0654/33 Q6(b)(ii) (Cambridge)
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The girl then clamps a ruler to the side of a table as shown in Fig. 3.3. 40.0 N ruler clamp 0.27 m table Fig. 3.3 She applies a force of 40.0 N to the end of the ruler which is 0.27 m from the edge of the table. Calculate the moment of the force about the edge of the table. moment = N m
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