### What magnitude of force must the worker apply

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##### Reference no: EM1313544

Q1. An electric scooter has a battery capable of supplying 140 Wh of energy. If friction forces and other losses account for 60.0 percent of the energy usage, what altitude change can a rider achieve when driving in hilly terrain, if the rider and scooter have the combined weight of 950 N?

Q2. A factory worker pushes a 30.0 kg crate a distance of 4.5 m along a level floor at constant velocity by pushing horizontally on it. The coefficient of kinetic friction between the crate and the floor is 0.25.

What magnitude of force must the worker apply?

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