Physics (AS & A Level) · May / June 2019 · Paper 12 · Question 14
A car of mass m travels at constant speed up a slope at an angle θ to the horizontal, as shown in the diagram. Air resistance and friction provide a resistive force F. The acceleration of free fall is g. What is the force needed to propel the car at this constant speed?
- Amg cos θ
- Bmg sin θ
- Cmg cos θ + F
- Dmg sin θ + F
As printed in the paper
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Correct answer: D. mg sin θ + F
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