posted by Johnny .
Balance of vertical forces problem. Three balanced forces pull on a ring that is centered over a force table. Two forces F1 and F2 are due to weights hanging from pulleys. A frictionless pulley changes the direction of a force without altering its magnitude. The third force F3 is applied by a string that passes over a pulley and pulls on the force transducer.
>From the balance of vertical forces, derive the expected value of theta2 in terms of m1, m2, and theta1.
Which equation is NOT used in the derivation?
The answer is D. Fg=Fcos(theta)