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1.7.4 Power

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Question 52

A crane lifts a container from the ground to a raised platform in 15 s. The useful work done against gravity is $W$ , and the useful power developed is $P$ . Extraordinarily, a second crane lifts the same container from the ground to the same platform in 10 s. Which of the following statements is correct regarding the second crane?

The useful work done is $W$ , and the useful power developed is more than $P$ .

The useful work done is $W$ , and the useful power developed is less than $P$ .

The useful work done is more than $W$ , and the useful power developed is more than $P$ .

The useful work done is more than $W$ , and the useful power developed is less than $P$ .

Markscheme

1.7.4 Power Questions

IGCSE
Physics
1.7.4 Power

95 exam-style questions on CIE IGCSE Physics 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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