- #1
chiurox
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Homework Statement
A 1.0kg ball is attached to a vertical rod by two strings. Each string is 1.0m long, and they are attached to the rod a distance of 1.0m apart. The rod-ball-strings setup is rotating about the axis of the rod. As it rotates the strings are taut and form an equilateral triangle. The tension in the upper string is 25N.
a. Describe a free-body diagram showing all the forces on the ball.
b. What is the tension in the lower string?
c. What is the net force on the ball when the ball is in the position as described in the question?
d. What is the speed of the ball
Homework Equations
Moment of inertia for thing rod about the center =(1/12)Ml^2
l=1m
m=1.0kg
so I = 1/12
The Attempt at a Solution
For part B:
The tension of the lower string would be less than the upper string, since the upper string has to cope with mg. So would T2 = T1-mg ?
Part C:
I'm not sure how to start this one...