Q. Weightlessness experienced while orbiting the earth in space ships is the result of:

 1680  199 Jharkhand CECEJharkhand CECE 2002 Report Error

Solution:

A person feels weightlessness on a satellite. This is because the gravitational force exerted by the earth on the man is just equal to the necessary centripetal force there and the normal reaction between the foot of the man and the floor of the satellite becomes zero.