What is Free body diagram: Definition and 249 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.
TL;DR Summary: I am Highschool student writing a 4000 word research paper on Bernoulli's principle and the coanda effect. I need help with derivation of a formula that connects flow rate of water and distance moved by the sphere in my experiment.
I am a high school student writing a 4000 word...
I'm having problem in drawing the distributed load (weight per foot) for the inclined beam as it shows.
should it be rectangular? if so shouldn't the distributed load be vertical down as the resultant weight at the centroid (W)
please help me understand how to draw the free body diagram for this...
If an elevator is moving upward, what does a downward acceleration mean? When applying the free body diagram, will the positive direction be upwards since the elevator is moving up?
Hoping someone can chip in and help me understand a problem when it comes to two-force members.
I have a structure as shown below. Essentially its a single body attached at 3 points with pin joints. My question is, is it appropriate to treat each of the left and right side as individual...
In this diagram, if the system begins by being held static, and then at time ##T## release of all components occurs, at all times ##>T##, until vertical movement stops upon vertical block ##m## making contact with the Normal Force at the base of block ##M##, will the lateral acceleration of...
So, to obtain the motion equations I initially plotted the free-body diagram (see picture). Then I’ve tried to get equations, but I’m not sure, do I have done it rightl. I will be gratefull if someone could help me.
Let's say you are riding a bike very fast, and then you sharply turn into a slide (where the bike is sliding perfectly sideways).
I'm trying to calculate the angle that the bike would be leaning at, but I'm having trouble creating the free body diagram.
Right now I have the normal force and...
So I’m a high school physics teacher and I came up with the question above. However I haven’t given it to my students because I’m not sure what the answer would be.
There is a force holding the gum up, and that force must balance the force of gravity. I’d probably call that an applied force, so...
I have a question regarding a homework exercise. My professor asked me to find the radial force in the free body diagram in the image included. There is a weight Fz from above and it is assumed that it is countered by the vertical component of both the Ff (friction force) and the Fn (normal...
Vehicle Mass : 3 tonnes
Manufacturer's instruction is to test vehicle's parking brake effectiveness is to engage parking brake on 30.96 degrees slope. If it holds, it is effective.
I do not have 30.96 degrees slope & I want to replicate the same test on flat ground. I was thinking of...
I have put a picture of the problem above. The picture below shows my free body diagram. Fg is the component of the gravitational force in the direction fo the tangent at the point of contact and Ff is the frictional force between the plank and cylinder. I put Ff in the opposite direction as Fg...
Hello,
I have designed a gearbox that bolts on to a fixed engine and fixed pump. It is completely supported by them. The total mass of the gearbox and the components attaching it to the engine and pump is 7.7kg. Its centre of mass is 0.167m along the x-axis and 0.09m along the z-axis from the...
So I started by checking the options.I substituted the value of friction in the equations I got by making free body diagrams.I got different value of Tensions.For 1 and 3 Tension came to be 38 N.For 2 Tension came out to be 42N and for 4 Tension came out to be 40 N.
Now I think that I will take...
To start off with, I can't seem to interpret the FBD here. Here are my drawing:
and what I interpret as.
From here, I feel like I can (it's wrong obviously but I'm not sure why) state that sin theta = o/h = o/mg = N/mg , so N= mg sin theta?
Thanks
Has anyone created a thread on Free Body Diagram on assembly having many components ? For example a Casing having premium threads in both end and a set packer within it. What would be the FBD equations to determine various forces and reaction forces
I want you to tell me if I'm right
For 1), does ##m_2## feel a normal force? Because I don't think so, since it isn't pushing the wall.
For 2), ##m_2## suffers a normal force because it feels a pseudo-force to the left and so it pushes the wall
FIRST PICTURE
I have some doubts here because of the spring... I'll tell you what forces I've drawn. For ##A##, I drew the weight and the force applied by ##B## (the normal force) on the vertical axis; and the elastic force pointing to the right on the horizontal axis.
For ##B##, I drew the...
Summary: In the situation given, all the surfaces are friction less, pulley is ideal and string is light, F=mg/2, Find the acceleration of block 2 ?
Here's the diagram--
My attempt- (i) I tried to solve the question by making FBD of the two blocks, but i am not able to draw all the forces...
Hello everyone. I find the following problem confusing.
A board sandwiched between two boards in the figure below weighs 95.5N. If friction exists between the middle and the compressing boards, draw the free body diagram of the middle board.
Below I attached the diagram found in the solution...
Hi i am posting this to double check my work. Please help and feel free to ask any questions. I posted a picture of my work and what i currently have.
1. Homework Statement
Two small insulating objects are hung from strings attached to the ceiling. The masses of each object is 0.0076 kg. The...
1. Having really hard time understanding the concept of moment and equilibrium in statics. In the following picture the man is carrying a 6kg uniform rigid board. I'm asked to calculate the amount of force the man feels on his shoulder. (at point A)
Now I know I'm supposed to start by making...
Homework Statement
3. Consider R2D2 (a droid) with mass 30kg riding on a Ferris wheel with diameter 25m, with a velocity of 2.8m/s.
a) Compute the free body diagram for R2D2 at the exact top, exact bottom and at both horizontal positions. Remember to include gravity. (Note: The forces act in...
Homework Statement
A 2kg block is being pushed along a ceiling with friction by an angled force of 70 degrees. I'm asked only for the free body diagram.
Homework EquationsThe Attempt at a Solution
I figured both the gravitational and normal force would point downwards, but the force applied at...
Homework Statement
A Mercedes-Benz 300SL (m = 1700 kg) is parked on a road that rises 15 degrees above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires? Important: Assume that the road is higher up to the...
(Mentor note: moved from General Eng hence not homework template)
This is the given scenario. I'm trying to find the 'String R (lower part)' force. I know every other variable (the angles, string L and string R and the Rectangle is a mass m). Any help would be appreciated!
On EngineersEdge.com they have a free body diagram of a scissor lift
https://www.engineersedge.com/mechanics_machines/scissor-lift.htm
Can anyone explain how the Fy, Fx components are determined? What is specifically confusing to me is how Fy is opposite in direction given the system.
To me...
Hi There,
Long time reader, first time poster..
I hope someone out there can help me. I'm designing an add-on to an existing piece of equipment and I'm unsure of how to calculate the resultant force output from a hydraulic cylinder.
On a straight push, the chosen hydraulic cylinder has an...
Homework Statement Determine the forces acting on the two rods in the figure. Explain which stresses that act on the rods and the bolts holding the rods to the brackets in point A and C.
Homework Equations
∑Fx = 0 ∑Fy = 0 ∑Fz = 0...
Homework Statement
A carriage is mounted on a spring, as shown in the diagram.
The bottom of the spring is fixed to the ground. The carriage (loaded with its passenger) has a mass of 150kg. The carriage can only move vertically. The natural length of the spring is 10m and its spring...
Hello,Ive got a question and wondering if there is someone that could help me? I would really appreciate it!
I am studying for an exam that I am going to have in a couple of weeks and it has been going great besides that I have been stuck on a question about tension in a preloaded system with a...
Homework Statement
Homework Equations
Trying to find the reaction forces at E. But, I am kinda confused about drawing the free body diagram for each member. I know that member AD and CB are two force members. What is wrong with my free body diagram then?
The Attempt at a Solution
i...
I am currently performing failure analysis on an A356 Aluminum alloy wheel subjected to rotational loading, with a maximum load of 650 kgf and a torque of 4600 Nm. Cracks formed in the wheel after 1.3*10^6 rotations.
My job is to perform a stress analysis to determine the regions of maximum...
Homework Statement
I am just going over my class notes and I just wanted to clear up a few concepts regarding forces and free-body diagrams -- I'm either missing some forces or adding one too many:
Identify the forces acting on objects in each of the following situations and draw a free-body...
Homework Statement
Two linear springs with stiffness Kh, Kv are attached to a single mass m at right angle to each other, i.e; one of the spring(Kh) is in the horizontal direction(x-axis) and the other(Kv) is in the vertical direction(y-axis).
A constant force F is being applied to the mass...
Homework Statement
Solve the free diagram of two stacked boxes on a frictionless table accelerated by a force.
Homework Equations
[/B]
None
The Attempt at a Solution
I have box 2 stacked on box 1. Box 1 is on a frictionless table and accelerated by a force. However, there is friction...
Homework Statement
A force F is applied on the bigger mass 'M', which results in the prevention of smaller masses M1 and M2 moving with respect to larger mass M. The mass 'M' slides smoothly on the frictionless surface. Find the magnitude of the force. The pulley is ideal also consider the...
Homework Statement
Two cylinders, each with a mass of 10kg, are lying on an L profile.
Neglect the thickness and weight of the L profile.
Calculate the reaction force in b and e.
Homework Equations
G = mg
The Attempt at a Solution
So I tried to make a free body diagram of the cylinders.
I...
This is a practical issue I've trying to resolve by understanding the physics. While I talk sailing jargon, ultimately this is a question of simple torsional forces on a body.
So: In a high wind, when heeled over, my boat does what's called "rounding up"; it turns sharply into the wind -...
I am installing an L-shaped bracket into a brickwork chimney to support some large pipework. I am trying to work out the forces in each fixing to ensure that I won't be pulling the bracket off the wall once the pipes are filled with water.
I've tried drawing the free body diagram and to resolve...
Hi,
Really need some help with figuring out the max bending moment in the diagram shown below (I'm aware this is extremely simple but time and stress appear to have the better of me, so any help is appreciated)
I think I've worked out the reactions at each support by doing m=wL as the...
Homework Statement
Hi, please see the attached file. I am trying to find the force as illustrated in the diagram.
Homework Equations
[/B]
The Attempt at a Solution
I've found the force for the 4deg beam and therefore the horizontal beam however I am unsure how to take into account the...
< Mentor Note -- thread moved to HH from the technical forums to use a scpecific schoolwork problem to illustrate the general concept of torque in a FBD >
I'm writing up a lab report for Physics class and I have to draw FBDs for torque being applied to a ruler resting on a pivot point. I've...
(This is NOT a homework problem. It's an engineering problem I'm trying to crack.)
A wheel with a rubber tire (friction) can roll on a suspended rail. Attached to it is a pendulum that's rigidly mounted on the axle of the wheel with a mass that can hand down and swing. (The wheel's rotation...
What would the Free Body Diagram of a Trebuchet look like (FOR THE SYSTEM)? Would it be comparable to a see saw/ teeter totter? I am aware of some of the forces at play, but I feel there is some I am missing.
Hello! I am just stuck on one part of this question and would be grateful for any help.
Question
A small block of ice slides from rest from the top of an inverted frictionless bowl of radius
R (above right). How far below the top x does the ice lose contact with the bowl?
Equations
mgx =...
I was wondering if anyone can provide feedback on my free body diagram of two objects acting on each other. The question is asking for two separate free body diagrams. A force is applied to object 1, and object 1 pushes against object 2. Object 1 is on wheels and object 2 is in contact with the...
Homework Statement
Homework Equations
U = 1/2 kx2
The Attempt at a Solution
So, I took dynamics off campus and needless to say, we didn't really do very much deriving so that aspect of physics really bogs me down and I'm trying to learn it now in another class. So if anyone wants to also...