(Solved by Humans)-A solar sail is a large, perfectly reflective sheet of
Question
A solar sail is a large, perfectly reflective sheet of lightweight material that allows a spacecraft to accelerate by using the radiation pressure from the sun. A sail in the shape of a square of side 800 m is attached to a spacecraft; the mass of the spacecraft and sail is 400 kg. If the spacecraft is motionless, relative to the sun, when at a distance of 1.20 AU,
what is its speed when it reaches a distance of 3.50 AU? ANS:38.5km/s
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