What is the tension of each wire?

1. Dec 16, 2004

tthaitanium

a massless scaffold is held up by a wire at each end. the scaffold is 12 meters long. a 300 newton box sits 3 meters from the left end. what is the tension of each wire? please help

Last edited: Dec 16, 2004
2. Dec 16, 2004

Staff: Mentor

Identify all the forces acting on the scaffold. Since the scaffold is in equilibrium:
(1) The net force on it must be zero
(2) The net torque about any axis must be zero (use an end as the axis)

3. Dec 17, 2004

Tjl

Neglecting torque, the scaffold's center of mass will be proportionaly distanced in accordance to the tension on each string. This is a rather hairy calculation, so I would advise the use of Doc Al's method if you are familiar with how to calculate torque.