You tie a stone to a string and whirl it around in a verticalcircle at constant

Question

You tie a stone to a string and whirl it around in a verticalcircle at constant speed. At what point in the motion would thestring be most likely to break?
A) No point in particular.
B) When the stone is at the level of your hand (i.e.,halfway between the lowest and highest point).
C) When the stone is at the top of thecircle.
D) When the stone is at the bottom of thecircle
You tie a stone to a string and whirl it around in a verticalcircle at constant speed. At what point in the motion would thestring be most likely to break?
A) No point in particular.
B) When the stone is at the level of your hand (i.e.,halfway between the lowest and highest point).
C) When the stone is at the top of thecircle.
D) When the stone is at the bottom of thecircle

Explanation / Answer

CentrifugalForce is point out from the center of thecircular motion, when the stone at the bottom, the centrifugalforce and the gravitational force is at the same direction so thetension is both of them add together, answer: D) When the stone is at the bottom of thecircle

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