- #1

giacomh

- 36

- 0

## Homework Statement

http://imgur.com/AjUdF

Segments AB and BC of the beam ABC are pin connected a small distance to the right of joint B. Axial loads act at A and at the midspan of AB. A concentrated moment is applied at joint B.

Find the reaction at A, B, and C.

## Homework Equations

ƩF

ƩM= (Fi)(di)

## The Attempt at a Solution

I split the bar at joint B and drew two separate free-body diagrams. For the right side of the bar, I have Cy and Cx at C, Bx from the pin, and the moment about B (100 ft-lb).

I solved:

ƩMb=10Cy-100

Cy=10

From there I took the moment of the entire bar about point A, and found By=-20 lb, which I don't think is correct.

I think I'm mostly confused because there are no downward y forces in this problem, and I didn't think rollers could ever have a downward force.

Thanks!