Physics (AS & A Level) · Feb / March 2023 · Paper 12 · Question 18

A spring has an unstretched length of 4.50 cm. The spring is fixed at one end and a force of 35.0 N is applied to the other end so that the spring extends. The spring obeys Hooke's law and has a spring constant of 420 N m⁻¹. What is the strain of the extended spring?

1. A0.019
2. B0.083
3. C1.85
4. D2.67

As printed in the paper