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1.7 Energy, work and power

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Question 388

A worker carries 40 bricks from the ground to a scaffolding platform. Each brick has a mass of 1.5 kg. The platform is 12 m above the ground.

How much work does the worker do against gravity on the bricks in carrying them to the platform?

A

180 J180\text{ J}180 J

B

720 J720\text{ J}720 J

C

7100 J7100\text{ J}7100 J

D

8400 J8400\text{ J}8400 J

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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