(i)[2]
Calculate the driving force produced by the car’s engine when the acceleration is $2\,\text{m s}^{-2}$.
(ii)[2]
Given that the car’s speed at this instant is $15\,\text{m s}^{-1}$, determine the rate at which the car’s engine is working.
Mathematics 9709 · AS & A Level · Energy, work and power
Energy, work and power — practice question
A car with mass $700\,\text{kg}$ moves along a straight horizontal road. The resistance to motion is constant at $600\,\text{N}$.