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1.7 Energy, work and power

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Question 144

A battery-powered toy car is driven across a flat, horizontal floor. The car stops several times during its journey, and its electric motor becomes warm.

Which form of energy does not change during this journey?

A

the chemical energy stored in the battery

B

the gravitational potential energy of the car

C

the internal (thermal) energy of the motor

D

the kinetic energy of the car

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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