Posted by **Mark** on Saturday, April 2, 2011 at 10:07am.

A 33kg traffic light hangs from a vertical beam by two wires. The wire on the left side of the light has an angle of 53 degrees to the beam and the right side wire has an angle of 37 degrees with the beam. Calculate the tension in each of the wires. Would the tension just be 33kg(sin53) + 33kg(cosin53) for the left side, and 33kg(sin37) + 33kg(cosine37) for the right side?

- physics -
**drwls**, Saturday, April 2, 2011 at 10:59am
Call the left side tension T1 and the right side tension T2. Vertical and horizontal equilibrium equations are:

Mg = T1 cos53 + T2 cos37

0 = T1 sin53 - T2 sin37

Mg = T1 cos 53 + T1*cos37*(sin53/sin37)

T1 = Mg/(0.6918 + 1.0598)

= 0.5709 M*g

You set up the equations or did the algebra incorrectly, and you also omitted the g factor that you need to get the tension in Newtons.

- physics -
**Mark**, Saturday, April 2, 2011 at 12:56pm
Thanks , I knew this just didn't seem right.

## Answer This Question

## Related Questions

- physics - A 1290-N uniform beam is attached to a vertical wall at one end and is...
- Physics! plese help - A 1320-N uniform beam is attached to a vertical wall at ...
- Math - A construction crew wants to hoist a heavy beam so that it is standing ...
- physics help - A 1210 N uniform beam is attached to a vertical wall at one end ...
- physics help - A 1210 N uniform beam is attached to a vertical wall at one end ...
- phys - A 1155-N uniform beam is attached to a vertical wall at one end and is ...
- physics - the figure shows a uniform beam of weight 420 N and length 2.0 m ...
- physics - the figure shows a uniform beam of weight 420 N and length 2.0 m ...
- Physics - A 1.500m long uniform beam of mass 30.00 kg is supported by a wire as ...
- Physics - Two artifacts in a museum display are hung from vertical walls by very...

More Related Questions