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Posted by on Wednesday, October 27, 2010 at 6:26pm.

A stone is tied to a string (length = 0.450 m) and whirled in a circle at the same constant speed in two different ways. First, the circle is horizontal and the string is nearly parallel to the ground. Next, the circle is vertical. In the vertical case the maximum tension in the string is 18.0% larger than the tension that exists when the circle is horizontal. Determine the speed of the stone.
I know how to figure it out. Just how do you get the radius?

  • AP PHYSICS - , Wednesday, October 27, 2010 at 7:12pm

    isn't the radius the length of the string?

  • AP PHYSICS - , Friday, January 20, 2017 at 9:08am

    The speed of the stone when? It changes in the vertical circle.

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