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.

  • Force Class 10 ICSE
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Answer

(a) The velocity of the stone is variable.

(b) Acceleration of stone is variable.

(c) The direction of acceleration of stone at any instance is to the centre of the 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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Class 10 ICSE Physics Full chapter Solution of chapter force

State whether the following statements are true or false by writing T/F against them.
(a) Earth moves around the Sun with a uniform velocity.
(b) The motion of Moon around Earth in a circular path is an accelerated motion.
(c) A uniform linear motion is unaccelerated, while a uniform circular motion is an accelerated motion.
(d) In a uniform circular motion, the speed continuously changes because the direction of the motion changes.
(e) A boy experiences a centrifugal force on his hand when he rotates a piece of stone tied at one end of a string, holding the other end in the hand.

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