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3.1 Energy stores and calculations

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Question 62
H

The diagram represents the energy transfers when a compressed spring launches a trolley. The spring's elastic store decreases by 5.0 J. The trolley starts from rest.

elastic store→Xkinetic store of trolley \text{elastic store}\xrightarrow{X}\text{kinetic store of trolley} elastic storeX​kinetic store of trolley elastic store→0.8 Jthermal stores \text{elastic store}\xrightarrow{0.8\ \mathrm{J}}\text{thermal stores} elastic store0.8 J​thermal stores

The trolley has mass 0.30 kg. Which is its speed just after launch, to two significant figures?

[1]
A

3.7 m/s3.7\ \mathrm{m/s}3.7 m/s

B

5.3 m/s5.3\ \mathrm{m/s}5.3 m/s

C

5.8 m/s5.8\ \mathrm{m/s}5.8 m/s

D

28 m/s28\ \mathrm{m/s}28 m/s

Markscheme

3.1 Energy stores and calculations Questions

  1. GCSE
  2. /Physics
  3. /3.1 Energy stores and calculations

121 exam-style questions on Edexcel GCSE Physics 3.1 Energy stores and calculations, covering 3.1.1 Gravitational potential energy, 3.1.2 Kinetic energy, and 3.1.3 Energy transfers and conservation of energy. Each one has a worked solution and a mark scheme showing where the marks go.

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