(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 180 g ball on a 60-cm-long string is swung in a vertical circle about a point 200 cm above the floor. The tension in the string when the ball is at the very bottom of the circle is 5.6 N. At the very bottom of the circle, a very sharp knife is suddenly inserted, as shown in the figure View Figure , to cut the string directly below the point of support.

2. Relevant equations

V=sqrt(a R)

a=(F-W)/m = (F - mg)/m=F/m -g

3. The attempt at a solution

R=.6m

For a free fall

t=sqrt(2h/g)

S=Vt=

S=sqrt(a R) sqrt(2h/g)

S=sqrt(a R 2h/g)

S=sqrt(2[F/m -g] R h /g)

S=sqrt(2 [ 5.6N/ .180 - 9.81] 0.6 x 0.200 /9.81)

S=0.72m

I keep getting this answer. I'm unsure of what I'm doing wrong.

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# Homework Help: Help with physics tension in the string

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