What is the tension of each wire?

  • #1
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
 
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Answers and Replies

  • #2
Doc Al
Mentor
45,247
1,594
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
Tjl
34
0
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.
 

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