Easy -1.8 This is a straightforward one-mark multiple choice question requiring direct application of the formula P = Fv. Students need only recognize that at constant speed, driving force equals resistive force (240 N), then multiply by speed (18 m/s) to get 4320 W. No problem-solving or multi-step reasoning required—pure formula recall with given values.
2 A car of mass 1200 kg is travelling at a constant speed of \(18 \mathrm {~m} \mathrm {~s} ^ { - 1 }\) on a straight horizontal road.
The car experiences a total resistive force of 240 newtons.
Calculate the power of the car's engine.
Circle your answer. [0pt]
[1 mark]
900 W
4320 W
16000 W
21600 W
2 A car of mass 1200 kg is travelling at a constant speed of $18 \mathrm {~m} \mathrm {~s} ^ { - 1 }$ on a straight horizontal road.
The car experiences a total resistive force of 240 newtons.\\
Calculate the power of the car's engine.\\
Circle your answer.\\[0pt]
[1 mark]\\
900 W\\
4320 W\\
16000 W\\
21600 W
\hfill \mbox{\textit{AQA Further Paper 3 Mechanics 2022 Q2 [1]}}