question_answer 49)

                  An astronaut inside a small spaceship orbiting around the earth cannot detect gravity. If die space station orbiting around the earth has a large size, can he hope to detect gravity?

Answer:

                  Gravity provides the necessary centripetal force to a small space ship orbiting around the earth. If the size of space station is very large, then the astonaut will experience gravitational force. Hence, lie can hope to detect gravity.