- #1

StaticWaffles

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## Homework Statement

A rod of negligible mass is supported by a hinge at the wall by a horizontal wire fastened at a 30 degree angle one-third of the way along the rod. A weight of 12 N hangs from the left end of the rod.

a) Find the tension (T) in the horizontal wire. (T = 62.2 N)

b) Find the magnitude and direction of the force that the hinge exerts on the end of the rod. (FH = 63 N, 11 degrees NW)

## Homework Equations

Sum of the Torques clockwise = Sum of the torques counterclockwise (ETcw = ETccw)

Basic trig like sin, cos and tan.

## The Attempt at a Solution

I solved a) already.

(Tcos60*1/3d) = (12cos30*d)

(T*0.1666666) = (10.39230485)

T= 62.3 N

(Here is a picture of the diagram; it's not very clear)

http://twitpic.com/bzeo8w

The angle the wire makes with the rod is 30 and the angle the weight makes with the rod is 60.

Question b) however I am completely stuck on, it would be great if someone could explain how to do it step by step.

http://twitpic.com/bzeo9g

I tried to find FHy and FHx however nothing made sense to me and I've spent three hours on this.