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Femme_physics

Gold Member

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I really appreciate you guys helping me in all those problems - tiny-tim, nvn! I appreciate the fact there's online support to help me get ready as I'm about to go into a study group with other students which I'll probably be the teacher of (they haven't solved most of what I solved partly thanks to you). I wanna get everything straight.

http://img256.imageshack.us/img256/4048/52987150.jpg [Broken]

Calculate the forces at the supports A and D of this hard frame depicted in the diagram. On the frame acts at point B horizontal force F. No need to consider the frame's weight.

The answers are written in the scanjob at the lower right section.

Okay, I get Rd: Tell me if it's correct

Sum of all moments on A = 0 = -F x a + D x 2a = 0

Rd = Fa/2a

Rd = 0.5 F

Okay, got it.

Sum of all moments on D = -F x a + Ray x 2a = 0

Fa = Ray x 2a

Ray = Fa/2a

Ray = 0.5 F

Okay....getting the same result in both....what's wrong with this picture?

## Homework Statement

http://img256.imageshack.us/img256/4048/52987150.jpg [Broken]

Calculate the forces at the supports A and D of this hard frame depicted in the diagram. On the frame acts at point B horizontal force F. No need to consider the frame's weight.

The answers are written in the scanjob at the lower right section.

## The Attempt at a Solution

Okay, I get Rd: Tell me if it's correct

Sum of all moments on A = 0 = -F x a + D x 2a = 0

Rd = Fa/2a

Rd = 0.5 F

Okay, got it.

Sum of all moments on D = -F x a + Ray x 2a = 0

Fa = Ray x 2a

Ray = Fa/2a

Ray = 0.5 F

Okay....getting the same result in both....what's wrong with this picture?

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