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

Click For Summary
SUMMARY

This discussion focuses on mastering free body diagrams (FBDs) for complex homework problems in mechanics. Key equations referenced include the equilibrium equations EF = 0 and EM = 0. Participants emphasize the importance of drawing reaction forces at support points and correctly representing applied forces, such as the 400 N force from the hand. The conversation highlights the necessity of showing work for verification and understanding, particularly for members labeled A, B, C, and D.

PREREQUISITES
  • Understanding of equilibrium equations in mechanics
  • Familiarity with free body diagram conventions
  • Basic knowledge of forces and their representations
  • Ability to analyze mechanical systems
NEXT STEPS
  • Study examples of free body diagrams in mechanics textbooks
  • Practice drawing free body diagrams for various mechanical systems
  • Learn about reaction forces and their significance in static equilibrium
  • Explore advanced topics in statics, such as moment calculations
USEFUL FOR

Students in engineering or physics courses, educators teaching mechanics, and anyone seeking to improve their skills in drawing and analyzing free body diagrams.

megr_ftw
Messages
68
Reaction score
0

Homework Statement


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



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.
 
Physics news on Phys.org
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.
 
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.
 
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).
 
draw nothing for C or D?
 
Draw nothing for D. Draw the 400 N force at C.
 

Similar threads

  • · Replies 12 ·
Replies
12
Views
3K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
1
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 2 ·
Replies
2
Views
4K