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1.7 Energy, work and power

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Question 9

A hoist is used to lift loads vertically.

The output power of the hoist to lift a storage crate is PPP.

The hoist then lifts a machine, which has 5.0 times the weight of the crate, through 0.40 of the distance in 0.80 of the time.

What is the output power of the hoist now?

A

2P5\frac{2P}{5}52P​

B

5P4\frac{5P}{4}45P​

C

5P2\frac{5P}{2}25P​

D

4P4P4P

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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