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1.7 Energy, work and power

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Question 352

An electric motor is used to pull a heavy box up a smooth inclined ramp.

Which of the following measurements is not needed to calculate the rate of work done by the motor against gravity?

A

the vertical height of the ramp

B

the slope length of the ramp

C

the time taken to pull the box up the ramp

D

the weight of the box

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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