An athlete lifts a heavy barbell of constant weight vertically through a height of 2.0 m four separate times. The time taken for each lift is recorded.
Which time is measured when the athlete's average useful power is greatest?
1.2 s1.2\text{ s}1.2 s
1.8 s1.8\text{ s}1.8 s
2.5 s2.5\text{ s}2.5 s
3.0 s3.0\text{ s}3.0 s
95 exam-style questions on CIE IGCSE Physics 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.