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| Q. |
A man inside an artificial satellite feels weightlessness because the force of attraction due to earth is – |
| A. | zero at that place |
| B. | is balanced by the force of attraction due to moon |
| C. | equal to the centripetal force |
| D. | non-effective due to particular design of the satellite |
| Answer» A. zero at that place | |
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Explanation: Earth attracts all bodies towards its centre. The acceleration produced in the body due to attraction force of earth on it is called the acceleration due to gravity. A astronaut in a satellite experiences weightlessness because two forces act on him: gravitational pull and centrifugal force which cancel out each other with the resultant force acting on him being zero. |
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