Physics (AS & A Level) · May / June 2018 · Paper 12 · Question 18

A steel sphere is dropped vertically onto a horizontal metal plate. The sphere hits the plate with speed u, leaves it at speed v, and rebounds vertically to half of its original height. Ignore air resistance. Which expression gives the value of v/u?

1. A1/2²
2. B1/2
3. C1/√2
4. D1 − 1/√2

As printed in the paper