Physics (AS & A Level) · May / June 2022 · Paper 13 · Question 14

An unknown mass and a 1.00 kg mass are fixed at opposite ends of a bar. The bar has negligible mass and a length of 30.0 cm. The bar balances when supported by a pivot placed 20.0 cm from the unknown mass, as shown. What is the unknown mass?

1. A333 g
2. B500 g
3. C667 g
4. D1000 g

As printed in the paper