posted by Sasha .
Astronauts who spend long periods in outer space could be adversely affected by weightlessness. One way to simulate gravity is to shape the spaceship like a cylindrical shell that rotates, with the astronauts walking on the inside surface. Explain how this simulates gravity. Consider
(a) how objects fall,
(b) the force we feel on our feet,
(c) and other aspects of gravity you can think of
consider centripetal force.