A ball of mass M is attached to a string of negligible mass that has a length R. The ball moves clockwise in a vertical circle, as shown above. Which of the following is true about the ball-string-Earth system as the ball moves from point 1 to point 2?
A ball of mass M is attached to a string of negligible mass that has a length R. The ball moves clockwise in a vertical circle, as shown above. Which of the following is true about the ball-string-Earth system as the ball moves from point 1 to point 2?
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I don't get why D is right , I throught the speed of a circular motions remains constant
Transcribed Image Text:1
2
A ball of mass M is attached to a string of negligible mass that has a length R. The ball moves clockwise in a vertical circle, as
shown above. Which of the following is true about the ball-string-Earth system as the ball moves from point 1 to point 2?
Transcribed Image Text:A
The potential energy decreases by MgR and the tension in the string increases by 2Mg.
В
The potential energy decreases by MgR and the tension in the string increases by more than 2Mg.
The potential energy decreases by 2M9R and the tension in the string increases by 2Mg.
D
The potential energy decreases by 2M9R and the tension in the string increases by more than 2Mg.
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