Question 1182821: A circular wheel of radius r rolls, without slipping, through half a revolution. The point X is on the horizontal diameter at the start.
The distance between the starting and finishing position of the point X is?
Answer by ikleyn(52781)   (Show Source):
You can put this solution on YOUR website! .
A circular wheel of radius r rolls, without slipping, through half a revolution.
The point X is on the horizontal diameter at the start.
The distance between the starting and finishing position of the point X is?
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As it is known, any diameter of a circle has 2 (two) endpoints.
Respectively, there are 2 different possible positions of the point X at the start, and, respectively,
two different final positions, giving two possible different answers.
So, if you want to get a unique answer, you must specify the initial condition in more accurate fashion.
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