Physics (AS & A Level) · May / June 2021 · Paper 12 · Question 17
9702Gravitational potential energy and kinetic energy
A constant force F, acting on a car of mass m, moves the car up a slope through a distance s at constant velocity v. The angle of the slope to the horizontal is α. The acceleration of free fall is g. What is the ratio gravitational potential energy gained by car / work done by force F ?
- Amgs sinα / Fv
- Bmv / Fs
- Cmv² / 2Fs
- Dmg sinα / F
As printed in the paper
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Correct answer: D. mg sinα / F
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