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1.7 Energy, work and power

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Question 443

A worker does some work by pushing a heavy box across a warehouse floor.

The worker then pushes a second box.

Which of the following combinations of force and distance indicates that the worker is now doing half as much work?

A

Force used is doubled; distance is doubled

B

Force used is doubled; distance is halved

C

Force used is halved; distance is halved

D

Force used stays the same; distance is halved

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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