Mathematics 9709 · AS & A Level · Newton's laws of motion

Newton's laws of motion — practice question

A car with mass 800 kg is travelling along a straight horizontal road, and its engine is doing work at a rate of 22.5 kW.

(main)[4]

Determine the resistance acting on the car when its speed is $18\,\text{m s}^{-1}$ and its acceleration is $1.2\,\text{m s}^{-2}$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Applying Newton’s second law with three forces” …