Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun.
a. If the sail material has a density of 600.0 kg/m3, what is the maximum thickness of the sail for which the force due to radiation pressure exceeds the gravitational force on the sail?
b. If the collector's area is 2.2e6 m^2. its thickness is 1 µm, and the craft carries a 99.0 kg payload, what is its acceleration at the radius of the Earth's orbit?