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Q1. An electric scooter has a battery capable of supplying 140 Wh of energy. If friction forces and other losses account for 60 percent of the energy usage, what altitude change can a rider achieve while driving in hilly terrain, if the rider and scooter have a combined weight of 967 N?

Q2. How to find the net gravitational force exerted by earth and moon on a 3.00x10^4 kg spacecraft located halfway between them. The distance separating moon and earth is 386000 km.

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