Physics
A piece of stone tied at the end of a thread is whirled in a horizontal circle with uniform speed with the help of hand.
Answer the following questions:
(a) Is the velocity of stone uniform or variable?
(b) Is the acceleration of stone uniform or variable?
(c) What is the direction of acceleration of stone at any instant?
(d) Which force provides the centripetal force required for circular motion?
(e) Name the force and its direction which acts on the hand.
Force
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Answer
(a) Velocity of stone is variable.
(b) Acceleration of stone is variable.
(c) The direction of acceleration of stone at any instance is to the centre of circular path.
(d) The frictional force provides the centripetal force.
(e) Centrifugal force acts on the hand and its direction is away from the centre.
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