Homework Help: Physics

Posted by Anonymous on Friday, May 18, 2012 at 6:07am.

A circular shop sign of mass 10kg is to be hung from the wall of the shop.

The sign hangs from a light, rigid horizontal support of length 0.48m that is hinged to the wall at one end A. The other end B of the support is attached by a model string to a point C at a distance 0.2m vertically above the point A. You may model the sign as a particle located below the midpoint of the horizontal support AB.

By taking torques abut the hinged end A, and considering equilibrium of the beam, find the tension in the rope.

Physics - bobpursley, Friday, May 18, 2012 at 9:00am
a. label the forces at the supports, and the hanging end.

Here it is in my head:
the angle at the rope to horizontal is Theta. W is the weight of the sign. T is tension.

Torque about A:
Tension*Lengthstring*cosTheta-Weight=0

but cosTheta= .48/lengthstring

Answer this Question

Related Questions

physics 121 hanging sign - A sign has a mass of 1050 kg, a height h = 1 m, and a...
Physics 121 HW - A sign has a mass of 1050 kg, a height h = 1 m, and a width W...
physics - A sign with a mass of 1000.0 kg is suspended from a wall with a cable...
Math - Students in Mr.Tandoc's shop class made a circular railroad crossing ...
Science - a 51.0 kg uniform square sign, of edge L = 2.00 m, is hung from a ...
English - 1. He is standing at the back of the shop. 2. He is standing behind ...
physics - a 51.0 kg uniform square sign, of edge L = 2.00 m, is hung from a ...
physics - A house address sign is hung from a post with a light wieght rod. If ...
physics - A shop sign weighing 230 N is supported by a uniform 115 N beam as ...
English - We can buy glasses at an optician's shop. We can buy jewels at a ...

For Further Reading

First Name:
School Subject:
Answer: