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Q. Many people mistakenly believe that the astronauts that orbit Earth are "above gravity." Calculate g for space shuttle territory 150 km above Earth's surface. Assume Earth's mass is 6.0 1024 kg, and its radius is 6.38 106 m (6380 km). Your answer is what percentage of 9.8 m/s2?

Q. A sack of flour of mass 7.00 kg is lifted vertically at a constant speed of 2.20 m/s through a height of 20.0 m.

What is the Force require?

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Category:- Physics
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