Explore BrainMass
Share

Find Force exerted

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

(See attachments.)

FYI: In this posting I will write A (sub x) as Ax. I will Write Sigma (or sum) as {E}

Find the force exerted by pin A on the structure.

I know that I first make the free body diagram.

1. Try the entire frame: IN second attachment, image on left.
Problem...this is 4 unknowns, but we're only allowed 3 unknowns in a 2-D situation. The 4 are : Ax, Ay, Bx, By. The three eqns. available are {E}Fx=0 ; {E}Fy=0 ; {E}M=0

So, I decided that this won't work.

2. Try FBD of AD: the second attachment, image on right
Again there are 4 unknowns, this time they are Ax, Ay, Cx, Cy...This won't work.

However I think that I may be able to combine the two systems of equations.

-> Ax, Ay, Bx, By, Cx, Cy

Now what? I think I may have to solve for Ax and Ay? How do I finish this?

© BrainMass Inc. brainmass.com October 16, 2018, 4:46 pm ad1c9bdddf
https://brainmass.com/engineering/structural-engineering/find-force-exerted-35939

Attachments

Solution Preview

From 1st FBD, moment about B:
sum(M_B) = 0
=> Ay*5 - 80*(10+8) = 0
=> Ay = 80*18/5 = 288 lb (^: upward)

From second ...

Solution Summary

The solution provided help to find force exerted to complete the answer step-by-step equationally.

$2.19
Similar Posting

Newton's Laws of Motion - Find the Force Exerted

A student tries to raise a chain consisting of three identical links. Each link has a mass of m. The three-piece chain is connected to a string and then suspended vertically, with the student holding the upper end of the string and pulling upward. Because of the student's pull, an upward force of F is applied to the chain by the string. Use Newton's laws to answer the following question.

Find the force exerted by the top link on the middle link.

View Full Posting Details