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Weightlessness is experienced when there is no net force acting on a body in the vertical direction. Whenever an object is rotating, such as the earth is, it applies an outward centrifugal force on the objects on its surface. At the equator, this force is in the direction exactly opposite to the force attracting us towards the earth, gravity.
If the earth were to spin faster by almost 17 times, the centrifugal force would become equal to the force of gravity and an object would experience weightlessness. 

A body become weightless at the equator if force of gravity and centrifugal force of the earth become equal.

When the centrifugal force is equal to the gravitational force of the body in that condition the body experiences weightlessness at the equator. The weight of the body is due to the higher gravitational force of the earth than its centrifugal force so if both forces are equal to each other than the weight becomes zero.

If the earth start to spin faster about 17 times, then the centrifugal force would become equal to the gravitational force and an object would experience weightlessness so we can conclude that a body become weightless at the equator if force of gravity and centrifugal force of the earth become equal.

Learn more: https://brainly.com/question/3135058

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