When an object is moving in a circle, its instantaneous velocity is always directed along the tangent to the circle at its current position. The string provides the centripetal force that constantly pulls the object towards the center, changing the direction of its velocity and keeping it in circular motion.
A stone tied to a string is whirled in a circle. As it was revolving, the rope suddenly snaps. Then
Asked in WBPSC CS Prelims 2018 · Topic: Mechanics (Newton's Laws of Motion and their applications)
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