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1.7 Energy, work and power

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Question 176

A builder carries 30 bricks from the ground to a scaffolding platform. Each brick has a mass of 2.5 kg. The scaffolding platform is 8.0 m above the ground. How much work does the builder do against gravity on the bricks in carrying them to the platform? (Use g=10 N/kgg = 10\text{ N/kg}g=10 N/kg)

A

200 J200\text{ J}200 J

B

750 J750\text{ J}750 J

C

2400 J2400\text{ J}2400 J

D

6000 J6000\text{ J}6000 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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