- #1

applesoranges

- 8

- 0

- Homework Statement
- The ball is spinning in horizontal plane attached with 2 massless strings to a rotating stick,

as shown in the picture. Find tension of the lower cord using the given value of tension in the upper cord and the mass of the ball. The length parameters are also given, so the angles can be calculated.

I don't want to copy the problem from the assignment in order not to violate any policies of my institution.

- Relevant Equations
- Fg=m*g, a=v^2/r

I have already solved this problem, just would like to double check something with you conceptually. I've got a negative result for the tension in the lower cord. Intuitively I think it is right, because the lower cord does not support the ball in its opposing the force of gravity. It actually adds up to the tension T1 ought to have. Please guide me in the understanding this problem. Also, for the summation of forces in the y-direction, if T2 is negative, the vector of T2x is in the same direction as m*g, that supports my result of T2 being negative. Am I on the right track?