(a)[3]
Calculate the power developed by the cyclist.
(b)[2]
Calculate the change in kinetic energy.
(c)[3]
Use an energy method to determine $d$.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A cyclist travels on a straight, level road. The combined mass of the cyclist and her bicycle is $70\text{ kg}$. At the moment when her speed is $4\text{ m s}^{-1}$, her acceleration is $0.3\text{ m s}^{-2}$. A steady resistive force of magnitude $30\text{ N}$ acts.