Physics (AS & A Level) · Oct / Nov 2022 · Paper 12 · Question 3

A spring is suspended from a fixed point and a force is applied. The position of a pointer attached to the bottom of the spring against a vertical ruler is recorded. Before the force is applied, the position of the pointer is (225 ± 2) mm. After the force is applied, the position of the pointer is (250 ± 2) mm. The extension of the spring is determined. What is the percentage uncertainty in the extension?

1. A1.6%
2. B1.8%
3. C8.0%
4. D16%

As printed in the paper