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1.7 Energy, work and power

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Question 159

A child slides down a slide, starting from rest at the top (point P). After reaching the bottom, the child slides along a flat, high-friction safety mat and comes to a complete stop at point Q.

Which of the following describes the correct sequence of energy transfers that have taken place between P and Q?

A

kinetic→gravitational potential→internal (thermal)\text{kinetic} \rightarrow \text{gravitational potential} \rightarrow \text{internal (thermal)}kinetic→gravitational potential→internal (thermal)

B

gravitational potential→kinetic→internal (thermal)\text{gravitational potential} \rightarrow \text{kinetic} \rightarrow \text{internal (thermal)}gravitational potential→kinetic→internal (thermal)

C

gravitational potential→internal (thermal)→kinetic\text{gravitational potential} \rightarrow \text{internal (thermal)} \rightarrow \text{kinetic}gravitational potential→internal (thermal)→kinetic

D

kinetic→internal (thermal)→gravitational potential\text{kinetic} \rightarrow \text{internal (thermal)} \rightarrow \text{gravitational potential}kinetic→internal (thermal)→gravitational potential

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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