Physics · May / June 2020 · Paper 11 · Question 16

In a weightlifting contest, an athlete lifts a metal bar of mass 20 kg fitted with a mass of 80 kg on each end. The lift from ground to a height of 2.5 m takes 0.50 s. The gravitational field strength g is 10 N / kg. What average power does the weightlifter exert in providing the gravitational potential energy during this lift?

1. A0.90 kW
2. B5.0 kW
3. C8.0 kW
4. D9.0 kW

As printed in the paper