Together two students exert a force of 640 n in pushing a, Physics

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Together two students exert a force of 640 n in pushing a

Together, two students exert a force of 640 N in pushing a car a distance of 30 m.

(a) How much work do the students do on the car?

(b) If the force was doubled, how much work would they do pushing the car the same distance?

(c) An electric motor develops 57 kW of power as it lifts a loaded elevator 16.5 m in 35 s. How much force does the motor exert?

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