A cyclist rides along a straight, level road at a steady speed.
The driving force on the bicycle is 40 N.
The cyclist travels 600 m in 120 s.
State the equation linking work done, force and distance moved in the direction of the force.
Calculate the work done by the driving force.
Calculate the useful power output of the cyclist.
The body of the cyclist transfers energy from its chemical store at a rate of 800 W.
Calculate the efficiency of the cyclist.
Give the energy store that most of the wasted energy is transferred to.
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.