What is Free body diagrams: Definition and 70 Discussions
A free body diagram consists of a diagrammatic representation of a single body or a subsystem of bodies isolated from its surroundings showing all the forces acting on it.
In physics and engineering, a free body diagram (force diagram, or FBD) is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a body in a given condition. They depict a body or connected bodies with all the applied forces and moments, and reactions, which act on the body(ies). The body may consist of multiple internal members (such as a truss), or be a compact body (such as a beam). A series of free bodies and other diagrams may be necessary to solve complex problems.
Homework Statement
A hockey puck slides along a horizontal, smooth icy surface at a constant velocity as shown. (Part A figure) Which of the following forces act on the puck?
Okay, for this the choices are (list check all that apply)
force of velocity x
air drag...
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.
Homework Statement
"Three blocks (m1, m2 and m3) are in contact with each other on a frictionless, horizontal surface. A horizontal force is applied to m1.
http://i4.photobucket.com/albums/y111/kathy_felldown/sb-pic0556.png
What is the net force on block 1? "
When drawing free body...
Hey everyone hows it going? I am not sure if this is the right place to be posting this question, but hopefully it is. My names Shawn and I am a senior in high school. I currently have AP calculus and gen physics, and I plan on taking the AP calculus test (ab) and hopefully the physics AP test...
Homework Statement
A man of mass 64.2 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 23.2 kg and is 3.2 m long. Suppose the man stands to the right from the middle of the scaffold that is a distance one sixth of the length of the scaffold. What is...
Homework Statement
I have 2 questions from a practice test paper that I can't do (I missed the lessons) - I've attached them, the other questions I did fine. They should be quite basic but I'm not sure if what I'm doing is right (only done physics for 2 weeks). If anyone could correct my...
Homework Statement
Three blocks, of masses m1 =26 kg, m2 = 38 kg, and m3 = 41 kg, are connected by two strings over two pulleys, as in the given attachment. Friction is negligible. Determine (a) the magnitude of the acceleration of the blocks and (b) the magnitude of the tension in each of the...
Homework Statement
20: Two boxes are sitting on top of one another. The top box has a mass of 5kg and is connected to the wall by an unstretched spring, k=2000N/m. The bottom box is 10kg. the static friction coefficient between the 2 boxes is 0.5, the kinetic friction coefficient between the...
Visualizing Free body diagrams? solved, thanks tiny-tim and doc Al!
I ran into a problem in my HW, I found the answer but I just have a hard time seeing as to WHY my answer is correct.
http://i163.photobucket.com/albums/t288/Kyin1/1-6.jpg
Thats the problem and my FBD is for block B. My...
Homework Statement
so I am a 8th grader and i got a homework asignment to draw free body diagrams of a roller coaster on inclines, straight aways and bottom of the hill. we didnt learn about physics yet so here's the question
- draw and label free body diagrams for the coaster car on...
My question is for free body diagrams with tension on top and mass hanging from the bottom. Why is it "T-mg" sometimes and "mg-t" other times. How do I know which one to use? I was doing gravitation questions where "T-mg=Fc" sometimes and "mg-t=Fc" other times.
Homework Statement
I have to do this for a lab. Draw and label the free body diaggram of a pendulum when it is at its maximum amplitude of 30 degrees. The magnitudes of the vectors must be correctly scaled and the directions correct.
Homework Equations
The Attempt at a Solution...
Hello all,
Since I have run into the problem of regularly leaving moments out of my free body diagrams (and vice versa), I thought I'd pose a question on the topic. In trying to wrap my head around the concept, I've gone back to the beginning of the semester's notes and that didn't really...
Question: "A block of mass m1 = 1.87 kg and a block of mass m2 = 5.84 kg are connected by a massless string over a pulley in the shape of a solid disk having radius R = 0.180m and mass M = 12.7 kg. These blocks are allowed to move on a fixed block-wedge of angle 31.4 degrees as in the figure...
https://www.physicsforums.com/attachment.php?attachmentid=4225&stc=1
Determine the reaction forces at the four contact points A,B,C,D. The hollow balls which are homogenous and made of the same material have masses of 1.02kg and 2.04kg and the chamber they sit in is 55.98cm wide. Everything...
A man sits in a bosun's chair that dangles from a massless rope, which runs over a massless, frictionless pulley attached to the ceiling and back down to the man's hand. The combined mass of the man and chair is 90.0 kg.
Ok, I found a solution that had T=Mchair*a + Fnormal + Mchair*g. How did...
Free Body Diagrams...help please!
hello hello,
i'm just having a bit of difficulty concerning free body diagrams:
how would i draw an FBD for the following...
a) an object has reached terminal velocity. would this mean that the object has reached a constant velocity, therefore force...
Hi all,
For an online physics assignment I have a question about a block resting on a slope. The question asks what forces are acting on the block.. and I was thinking normal and weight force? But it turned out to be incorrect...
list of possibilities to choose from
weight
kinetic...