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Physics (Cambridge)

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M/J · 5054/22 · 2025 · Q28 marks · sit it in its paper
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CIE-5054-2025-MJ-p22 · Question 2

Theory: answer all nine questions. Show working and units. For drawings or plotted graphs, upload a clear photo of your sketch on the supplied figure.

Fig. 2.1 shows a fork-lift truck used to lift a load.

When lifting the load, the electric motor on the fork-lift truck has a useful output power of 600 W.

(a)Define ‘power’.

[1 mark]

The efficiency of the motor is 70%.

(b)Calculate the input power to the motor.

Answer guidance

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

[2 marks]

The fork-lift truck lifts a load with mass of 50 kg through a vertical distance of 2.3 m.

(c)(i)Calculate the work done in lifting the load.

Answer guidance

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

[2 marks]

(c)(ii)Calculate the time taken to lift the load.

Answer guidance

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

[2 marks]

(d)Describe how energy is transferred to thermal energy as the load is lifted by the fork-lift truck.

Answer guidance

Describe Say what happens, in order. Reasons are not required unless the question also asks why.

[1 mark]