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15.1 Forces and springs

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Question 39
H

A spring has a spring constant of 500 N/m. It stores 0.625 J when stretched within its linear range. Use E=12kx2\displaystyle E=\frac{1}{2}kx^2E=21​kx2 and F=kxF=kxF=kx. What is the stretching force?

[1]
A

50 N50\ \mathrm{N}50 N

B

25 N25\ \mathrm{N}25 N

C

12.5 N12.5\ \mathrm{N}12.5 N

D

1.25 N1.25\ \mathrm{N}1.25 N

Markscheme

15.1 Forces and springs Questions

  1. GCSE
  2. /Physics
  3. /15.1 Forces and springs

102 exam-style questions on Edexcel GCSE Physics 15.1 Forces and springs, covering 15.1.1 Elastic and inelastic distortion, 15.1.2 The spring constant, 15.1.3 Work done in stretching a spring, and 15.1.4 Linear and non-linear force–extension. Each one has a worked solution and a mark scheme showing where the marks go.

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