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1.7 Energy, work and power

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Question 294

An electric fan transfers energy from a mains electrical supply to the kinetic energy store of its rotating blades.

A catapult transfers energy from an elastic potential energy store to the kinetic energy store of a launched stone.

What pathways enable these energy transfers?

A

Electric fan: mechanical work; Catapult: electrical work

B

Electric fan: electrical work; Catapult: mechanical work

C

Electric fan: electrical work; Catapult: electrical work

D

Electric fan: mechanical work; Catapult: mechanical work

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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