(a)[3]
Determine the power of the car’s engine, knowing that its acceleration is $0.5\,\text{m s}^{-2}$ when its speed is $20\,\text{m s}^{-1}$.
(b)[2]
Determine the steady speed that the car can keep when the engine is operating at this power.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A car with mass $1800\,\text{kg}$ is moving along a straight horizontal road. The car’s engine delivers constant power. A steady resistive force of $650\,\text{N}$ acts against the motion.