Physics · May / June 2023 · Paper 12 · Question 10

A load–extension graph for a spring is shown. [graph: load vs extension, with points P at origin, Q on the straight line, R at the end of the curve] Which point is the limit of proportionality for the spring and what is the spring constant of the spring equal to? | | limit of proportionality | spring constant is equal to | |---|---|---| | A | Q | the gradient of PQ | | B | Q | the gradient of QR | | C | R | the gradient of PQ | | D | R | the gradient of QR |

1. Alimit of proportionality: Q; spring constant is equal to: the gradient of PQ
2. Blimit of proportionality: Q; spring constant is equal to: the gradient of QR
3. Climit of proportionality: R; spring constant is equal to: the gradient of PQ
4. Dlimit of proportionality: R; spring constant is equal to: the gradient of QR

As printed in the paper