- #1

hangingwire

- 8

- 0

## Homework Statement

Find cord tension and force on the hinge on this beam given the following:

Picture of the equation (in attachments)

beam is 10 kg

beam is 8.0m long

## Homework Equations

[T=0

[F=0

[h2]The Attempt at a Solution[/h2]

Finding the Torque on the wire...

I attached my FBD I drew. Before I start, one question? Since the beam is on an angle, would there be a horizontal force on the x-axis resulting from the Mass of the beam? If so, It could be 60 degrees? Mg Sin60?

That is my attempt using the "Z-rule" in angles

Anyways:

[T= 0

Tcw = Tccw

mg(d) = Tsin( ) * (d)

(10)(9.8)(4) = T sin30 * (8m) ----> Sin 30* given that directly across is 90 degrees + 60 degrees given = 30 degrees left at where the beam and wire are attached.

392N = T sin30 * (8m)

392N divided by 8m = 49

49 = T sin30

49 divided by sin30 --> 98?

The answer is 49N. Why did I get double the answer? Is there something with my angles?