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1.7.1a Energy stores and energy transfers

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Question 95
a.

A student performs repetitive pull-up exercises. In each pull-up, the student lifts their body vertically through a distance of 0.55 m0.55\text{ m}0.55 m. The weight of the student is 540 N540\text{ N}540 N. Calculate the work done by the student in rising 0.55 m0.55\text{ m}0.55 m.

[2]
b.

The chemical energy store in the student's body decreases as they do pull-up exercises. State two energy stores that increase as a result of energy transfers from the student's chemical energy store.

[2]
c.

Another student transfers 4500 J4500\text{ J}4500 J of energy in a time of 50 s50\text{ s}50 s. Calculate the student's power when transferring this energy.

[2]
Markscheme

1.7.1a Energy stores and energy transfers Questions

  1. IGCSE
  2. /Physics
  3. /1.7.1a Energy stores and energy transfers

229 exam-style questions on CIE IGCSE Physics 1.7.1a Energy stores and energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.

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