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1.7 Energy, work and power

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Question 31

A warehouse worker lifts 25 boxes from the ground onto a shelf 1.6 m high.

Each box has a mass of 5.0 kg.

(Take the gravitational field strength g=10 N/kgg = 10\text{ N/kg}g=10 N/kg.)

What is the work done against gravity by the worker in lifting the boxes onto the shelf?

A

80 J

B

200 J

C

400 J

D

2000 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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