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A .5kg ball on the end of a string is revolving uniformly in ahorizontal circle of radius 1m. The ball makes 2 revolustion in a second.
a) determine the linear (tangential) speed of the ball.
For this part of the question would I do this:
b)determine the ball's centripetal acceleration

c)determine the force a person must exert on the opposite end of the string.

Is this correct? The only thing i'm not too sure about is part a). Thanks in advance for your help.

  • physics -

    The distance around the circle is 2PI*radius, v= distance/time You have distance equal to radius.

    The centripetal force is indeed v^2/r, your numbers are of course wrong.

    part A messes up part b, c.

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