- #1

zcabral

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*****circular motion!*****

## Homework Statement

http://www.webassign.net/pse/p6-11.gif

A 3.60 kg object is attached to a vertical rod by two strings as in Figure P6.11. The object rotates in a horizontal circle at constant speed 7.20 m/s.

(a) Find the tension in the upper string.

(b) Find the tension in the lower string.

## Homework Equations

T=mg/costheta

m(v^2/r)=Tsintheta

## The Attempt at a Solution

I tried to solve for r and i got 1.32 but when i plugged it into the equation for tension it said it was wrong. i tried to solve for theta and got 41.3 in order to plug into the equation and it was wrong as well. what am i doing wrong??