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1.7 Energy, work and power

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Question 297

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

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

A

the distance the force moves the object is needed (✓\checkmark✓); the time for which the force acts is needed (✓\checkmark✓)

B

the distance the force moves the object is needed (✓\checkmark✓); the time for which the force acts is not needed (×\times×)

C

the distance the force moves the object is not needed (×\times×); the time for which the force acts is needed (✓\checkmark✓)

D

the distance the force moves the object is not needed (×\times×); the time for which the force acts is not needed (×\times×)

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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