HOOKE'S LAW

2 marks · Normal

A spring has an original length of 14.6 cm. When a force of 3.5 N is applied, the length of the spring increases to 16.1 cm. Calculate the extension of the spring produced by the force. Give your answer in centimetres.

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1.5 cm (±0.1)

Also accept: 1.5

Common mistakes: Using force instead of difference in lengths

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Marking points

M1 · 1 mark · Subtract the original length from the stretched length.

A1 · 1 mark · Correct extension (1.5 cm).

Worked solution