Physics (AS & A Level) · May / June 2025 · Paper 11 · Question 15

A student balances a 30 cm ruler on a fulcrum set at the 15 cm mark. She then places a 50 g mass on the 23 cm mark and a 20 g mass on the 11 cm mark, as shown. Which mass should she place on the 7 cm mark to restore the balance?

1. A30 g
2. B40 g
3. C47 g
4. D133 g

As printed in the paper