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1.1 Energy changes in a system, and the ways energy is stored before and after such changes

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Question 7
F

A crane raises a steel beam of mass 400 kg from the ground to the top of a building. The beam is raised through a vertical height of 45 m in 90 s. The gravitational field strength is 9.8 N/kg.

a.

Calculate the gain in the gravitational potential energy store of the beam.

[3]
b.

Use your answer to part a) to calculate the power output of the crane.

[3]
c.

The crane raises the same beam through the same height in 45 s. Give the effect of this on the power output of the crane.

[1]
Markscheme

1.1 Energy changes in a system, and the ways energy is stored before and after such changes Questions

  1. GCSE
  2. /Physics
  3. /1.1 Energy changes in a system, and the ways energy is stored before and after such changes

40 exam-style questions on AQA GCSE Physics 1.1 Energy changes in a system, and the ways energy is stored before and after such changes, covering 1.1.1 Energy stores and systems, 1.1.2 Changes in energy, 1.1.3 Energy changes in systems, and 1.1.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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