Mastering Free Body Diagrams: Tips and Tricks for Difficult Homework Problems

[megr_ftw]

Homework Statement

Here is pictures of some of the mechanisms I draw the free body diagrams for

Homework Equations

EF= 0
EM= 0

The Attempt at a Solution

I am not sure how to even begin on the first problem other than drawing the force from the hand of 400 N.

 

[nvn]

Hi, megr_ftw. Read your textbook, and study the example problems, and this will show you how to get started. You must show your work; and then someone might check your math.

 

[megr_ftw]

my book isn't very good with example such as the ones above. I just need help getting started, I am not asking anyone to solve all 3 of them, just some advice.

 

[nvn]

Hint: Draw member ABC. Then draw reaction forces acting on member ABC in the x and y directions at the supports (points A and B).

 

[megr_ftw]

draw nothing for C or D?

 

[nvn]

Draw nothing for D. Draw the 400 N force at C.