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1.7 Energy, work and power

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Question 231

To calculate the work done by a constant force acting on an object, the size of the force must be known.

What else needs to be known to calculate the work done?

A

Distance moved in the direction of the force: needed; Time for which the force acts: needed

B

Distance moved in the direction of the force: needed; Time for which the force acts: not needed

C

Distance moved in the direction of the force: not needed; Time for which the force acts: needed

D

Distance moved in the direction of the force: not needed; Time for which the force acts: not needed

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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