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## Homework Statement

a 500 g ball moves in a verticle circle on a 1.01 m long string. if the speed at the top is 4.3 m/s, then the speed at the bottom will be 7.62 m/s. what is the tension of the string when the ball is at the top? when is the tension of the string when the ball is at the bottom?

## Homework Equations

tension = (F

_{net})=mv

^{2}/r

## The Attempt at a Solution

top:

tension = (F

_{net})=(0.5 kg)(4.3)

^{2}/(1.01) = 9.15 N

bottom:

tension = (F

_{net})=(0.5 kg)(7.62)

^{2}/(1.01) = 28.7 N

these answers are wrong, however. and i'm not exactly sure why.

pointers in the right direction would be much appreciated!