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.
(f) What happens if the thread suddenly breaks? Give reason for vour answer.

Question

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.
(f) What happens if the thread suddenly breaks? Give reason for vour answer.

KnowledgeBoat · Accepted 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 Tension in the string provides the centripetal force.

(e) The force acting on the hand is the reaction tension force, directed away from the center.

(f) If the thread suddenly breaks, the stone will move along a straight-line path tangential to the circular path at the point where the thread breaks because the centripetal force provided by the tension in the thread disappears and according to Newton’s first law of motion, the stone continues to move in the direction of its instantaneous velocity, which is along the tangent to the circle at that point.

Physics

Force

Answer

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