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1.7 Energy, work and power

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Question 129

An archer drawing a bow transfers energy from a chemical energy store in their muscles to an elastic potential energy store in the bow.

An electric drill transfers energy from a chemical energy store in its battery to a kinetic energy store of the rotating drill bit.

What enables these energy transfers?

A

Drawing a bow: electrical work; Electric drill: mechanical work

B

Drawing a bow: electrical work; Electric drill: electrical work

C

Drawing a bow: mechanical work; Electric drill: mechanical work

D

Drawing a bow: mechanical work; Electric drill: electrical 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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