A powered cable moves two pieces of stage scenery across a horizontal floor. During each movement, the pulling force is constant and acts in the direction of motion.
| Movement | Pulling force / N\mathrm{N}N | Distance moved / m\mathrm{m}m |
|---|---|---|
| first | 160 | 3.6 |
| second | 240 | 5.0 |
The first movement takes 4.8 s.
The useful power output of the cable is the same during both movements.
Calculate the time taken for the second movement.
128 exam-style questions on Edexcel GCSE Physics 8.3 Power and efficiency, covering 8.3.1 Power and 8.3.2 Efficiency. Each one has a worked solution and a mark scheme showing where the marks go.