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1.7 Energy, work and power

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Question 7

Two workers, Liam and Noah, try to move identical heavy crates, Crate A\text{Crate A}Crate A and Crate B\text{Crate B}Crate B, which are initially at rest on the floor.

  • Liam pushes horizontally against Crate A\text{Crate A}Crate A with a large force, but the crate does not move because it is wedged against a wall.
  • Noah lifts Crate B\text{Crate B}Crate B vertically upwards from the floor and places it on a tall shelf.

Which worker does the most work on their crate, and which crate gains the most energy?

A

Liam | Crate A\text{Crate A}Crate A

B

Liam | Crate B\text{Crate B}Crate B

C

Noah | Crate A\text{Crate A}Crate A

D

Noah | Crate B\text{Crate B}Crate B

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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