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1.7 Energy, work and power

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Question 282

A motorized conveyor belt is used in a warehouse to lift identical packages from the floor to a raised mezzanine.

The operators increase the speed of the motor so that more packages are lifted to the platform in a given time.

How does this change affect the work done against gravity in lifting each package and the useful power output of the motor?

A

Work done against gravity: increases; Useful power output: decreases

B

Work done against gravity: increases; Useful power output: increases

C

Work done against gravity: remains the same; Useful power output: decreases

D

Work done against gravity: remains the same; Useful power output: increases

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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