Statics Definition and 906 Threads

A 70 kg overhead garage door consists of a uniform rectangular panel AC, 2100 mm high, supported by the cable AE attached at the middle of the upper edge of the door and by two sets of frictionless rollers A and B. Each set consists of 2 rollers located on either side of door. The rollers A are...

Homework Statement http://aycu38.webshots.com/image/29917/2000751813907860134_rs.jpg Homework Equations http://aycu03.webshots.com/image/28722/2000720045713558449_rs.jpg The Attempt at a Solution http://aycu07.webshots.com/image/27726/2000735660703319218_rs.jpg i assumed that...

does anyone know how to do this question? http://img522.imageshack.us/img522/7416/staticssm6.jpg i've tried to work it out but i just can't seem to get it. i've tried the using the usuall trigonometry stuff but i can't seem to appply it to this question. thanks scott.

Homework Statement There is a homogeneous rod stabilized on three fulcrum points. The separation of the fulcrums are of different distances. What forces act in the individual fulcrum points, if the mass of the rod is m? [The rod has to be stable, and hence the net force, torque = zero]...

Hi all, I am a little confused with a supposedly simple statics concept. The topic was on vector forces and the polygon of forces with respect to a static mechanics problem. The text i was reading was a little confusing: The text also shows a diagram both spatial and a 2D polygon of...

Homework Statement Determine the moment of the 50lb force about point A by resolving the force into horizontal and vertical components. Homework Equations I am using the book statics and strength of materials 2nd edition by Cheng, and its problem 2-31, i have racked my brain and...

I think I am getting the wrong answer here, but I don't know why. Would someone please be so kind to go through this basic stuff. Question: The force F exerts a 200 ft-lb counterclockwise moment about A and a 100 ft-lb clockwise moment about B. What are F and theta?Attempt: M_A = 2 F \cos...

Homework Statement Show that AXB is not equal to BXA No variables given..just this equation Homework Equations The Attempt at a Solution I don´t know how to start...the only thing I know so far is that AXB is equal to -BXA

Homework Statement I do not have a problem in general to discuss. Just wondering if anyone has any good suggestions into helping me solve statics problems. We are currently working equilibrium problems in 3 dimensions. I don't have a problem with the math as much as just setting up the...

Homework Statement See the attachment Homework Equations The Attempt at a Solution I am pretty lost where to start... no relationship pops out at me to help in finding the components of the PR and QR to find the magnitude of QR and PR. I know lots of angles, but don't see how I...

im confused as to how density is incorporated in this problems solution. any help as to how to solve this problem would be much appretiated. consider a heavy cable of diameter d and density p from which hangs a load of mass M. what is the tension in the cable as a function of the distance...

Homework Statement This is the diagram of the question. There are 3 wooden beams nailed together and supported at A,D, and F. Assuming only vertical forces, what are the vertical reactions at A, D, and F? The solution uses this diagram to make three basic equations: (1) for BEF...

Sorry for not using the template, but this question I have is not very complicated (or I hope so). I was creating a couple of problems with beams (Statics) and I came up with one where one of the support reactions has a negative value. The beam has 2 supports, one of them restricts all possible...

My professor today told the class(engineering statics) that we should invest in the ti-89 or an equivelant. He claimed that the ti-83 was good for middle school but not for University work. However, I was forced to buy a ti-83 because the math department at my school doesn't allow anything...

Homework Statement I only just started thinking about this, so I apologize if I can't frame it correctly... But say I have a completely uniform beam sitting on, say, 8 supports all distributed evenly about the beam's center of mass (which is also its geometric center). That is, for every one...

When finding the force required to hold the dish in place, do I have to take account for both of the "jets" going out from center? I mean, there will be two forces in the negative x direction because of the water jet right? I hope the question is clear enough :redface:

Homework Statement A uniform rigid rod of mass M and length L is suspended by three massless strings, as shown in the following picture: Two of the strings are at either ends of the rod. The third string is a length x from the left end. Find the tension in these three strings. Homework...

Please click on the image to make it larger. http://img177.imageshack.us/img177/2355/staticsqn5.th.jpg I understand the problem here, what I don't see is how to find the support reactions. Since at each joint we have more than two unknowns I have to find the support reactions. I have the...

Homework Statement I've included a picture of the problem so you can see the diagram too. The question is asking for the tension of 1 cable, when 2 are given (problem# 41).Homework Equations no equations per se.The Attempt at a Solution I resolved cable AC and cable AD, but don't know how to...

First time posting hi guys and thanks for the help before i even start :) here goes, i am on question 4 and I am not the best with this but to be far i am not 100% sure on the question here goes An aircraft flies throught still air at a velocity of 100ms-1 due East. However due to a wind...

Please click the image to enlarge it http://img257.imageshack.us/img257/3952/problemfy9.th.jpg I think I have this problem solved correctly, but please check my solution. In the image my problem is *4-24 The 70-N force acts on the end of the pipe at B Determine (a) The moment of this force...

Homework Statement A tile on a roof becomes loose and slides from rest down the roof. The roof is modeled as a plane inclined at 30 degrees to the horizontal. The co-efficent of friction between the tile and the roof is 0.4. The tile is modeled as a particle of mass 'm'kg. a) Find the...

Homework Statement a 2.9 lb force P is appplied to the lever which controls the auger of a snowblower. determine the value of alpha knowing that the moment of P about A is counterclockwise and has a magnitude of 17 lb*in Homework Equations The Attempt at a Solution i thought i...

This isn't a homework problem, I just have a general problem with solving AS level (M1) statics questions in mechanics that are similar to this example (our teacher have moved on to the next module now but I'm still stuggling with these): example A particle of mass 3kg rests in limiting...

Homework Statement One end of a post weighing 400N and with height h rests on a rough horizontal surface with (mu) = .30. The upper end ish help by a rope fastened to a surface and making an angle of 36.9° with the post. A horizontal force F is exerted on the post. (a) If the force F is...

Yeah - so this WAS on our homework, but our professor was even stumped at first...Eventually he figured it out, but he told us not to worry about it. But of course, I'm SUPER curious! Can someone help me figure this out? http://img120.imageshack.us/img120/4610/staticskg2.gif It's a 10...

Hi, I am Rigon from Macedonia. I am studying Mechatronics on the faculty of Mechanical Engineering in Skopje.Now I am in the first year.Can somebody help me to tell where I can find free e-books or tutorials for statics or something similar.I hope somebody will help me.Thanks

A 30 kg rod one meter long is supported by a hinge A hanging from the ceiling. The rod rests on a peg "C" at a point .7 meters along the rod away. A vertical force of 1000 N is applied to the end of the rod. The rod rests at an angle of 30 degress from the vertical. Find the x and y...

hi all, I'm new to this forum and have read through a lot of the topics. i also tried searching the previous problems, but haven't found anything yet. anyways, here's my question: how do i find the reaction (normal) forces on points C, B, and A? I'm trying to do this with the vector...

Any help will be greatly appreciated. Simple representation of the problem is the analysis of the forces and reactions of a table with a non-centered weight on it. I am seeking the reaction forces at the four legs. Specifics... Table width - 48" Table length - 72" Table height - 36"...

Given: A ramp which is sitting as illustrated below. The ramp weighs 200 lb. http://img165.imageshack.us/img165/8601/problem523fe4.th.png Find 1: Cable force (line CD) so that the reaction at point B=0. Find 2: Determine the Horizontal and vertical components of pin hinge at point A...

I'm really stuck on how to start these two questions. Could someone please give me some hints? Any help would be really appreciated. 1. A body of mass 1.5kg is placed on a plane surface inclined at 30 degrees to the horizontal. Calculate the friction and the nornal reaction which the plane...

Information given: boat owner pulls her boat into the dock shown, where there are six capstans to which to tie the boat. She has three ropes. She can tie the boat from the boat's center (A) to any of the capstans (B through G) along the dotted arrows shown. Suppose the owner has tied...

Hello guys, I'm new to this forum. Ah.. I'm having a problem with statics, was supposed to pass up my lab report today but was told to redo the introduction. I was told that the introduction must mention Static equilibrium->Newton ->motion->translation->force->center of mass...

I need to find the Forve Vector (30N) as a Cartesian vector. Given the information given, I believe that the angles of the Triangle are: 90, 32.37, and 57.63. This gives the projected vector in the x, y plane as 16.1 N. The answer should be : - 13.2i - 17.7j + 20.3k. Help...

This is a problem in my homework. My friend and I have been working on it for the past week and cannot match the answer to the back of the book. I think my main problem is I don't understand what it is trying to say about the dimensions of the force P. The 5 degrees and the 70 degrees doesn't...

Heres the problem. A bridge span is 5m high and 20m long. Find the verticle force and the horizontal thrust on each of the piers P in terms of weight suspended from the center of the span. I really hope you can understand the geometry of the problem without the drawing(there was a drawing...

Hello, I am having a little trouble with this statics problem: "A 15.0 m uniform ladder weighing 500 N rests against a frictionless wall. The ladder makes a 60 degree angle with the horizontal. (a) Find the horizontal and vertical forces the ground exerts on the base of the ladder when an...

I have two different ways to solve this question. The first method is using the method taught in textbook: Draw the parallelogram and bend F to a direction which is perpendicular to the resultant force, and use sine rule to find F. The second method I use is by assuming the direction of the...

Hello , I've come across a phrase that i don't understand while doing an exercise in this chapter . What's the meaning of a 'uniform paper collar' Please explain to me =) Cheers mate

for statics , in the bending moment diagram,or the shear stree diagram how can i find maximum bending moment ?? any condition for that??or any recommended websites with diagram is appreciate thanx

Here's a statics problem that I'm unsure about. The system is in static equilibrium, and I'm supposed to find the reaction forces. {convention: right and up are taken as positive for x and y respectively, and counter-clockwise is positive for moment} \sum F_{y} = 0 B_{y} = -1000N \sum F_{x} =...

http://img103.imageshack.us/img103/6237/yffigure11407dw.jpg "One end of a uniform meter stick is placed against a vertical wall View Figure . The other end is held by a lightweight cord that makes an angle \theta with the stick. The coefficient of static friction between the end of the meter...

I'm trying to solve the problems on this page: http://physics.uwstout.edu/StatStr/statics/StatII/statp21f.htm The second last one is a bit hard for me, but I think I've got it. Just need to get my approach confirmed as correct. I first found the external support reactions, that went fine...

A swimming pool has dimension 23.0 m by 8.0 m with a depth of 3.0 m. When it is filled with water, what is the force (resulting from the water alone) on the bottom? When it is filled with water, what is the force (resulting from the water alone) on each short side? i figured out part a...

Question: Beam AB is subject to a uniform load of 300N/m and is supported at B by column BC. If the static coefficients of friction at B and C are (muB) = .2 and (muc) = .5, determine the force P needed to pull the column BC out from under the beam if P is .25m away from C and .75m away from B...

I have attached a sketch of a 3-d system. There are two rods of equal length (35cm) and equal mass. The masses are equal but unknown (mass of rod #1 = mass of rod #2). Please note that rod #2 is attached to rod one by a small connecting rod (3cm in length). Also note that the width of all rods...

Statics Problem...Please Help I have attached a sketch of a 3-d system. There are two rods of equal length (35cm) and equal mass. The masses are equal but unknown (mass of rod #1 = mass of rod #2). Please note that rod #2 is attached to rod one by a small connecting rod (3cm in length). Also...

hey all. I'm having problems with what should be a simple statics problem. "The Magnitude of force F is 80.0 N. What are the madnitude of its components a) F\ab and b) F\ac that are parallel to the bars AB and AC respectively." The picture: Force F pointing straight down. bar AB...

Vibrations and Fluid Statics One end of a horizonatal wire is fixed, while the other passes over a smooth pulley and has a heavy weight attached to it. The frequency of the fundamental note emitted when the wire is plucked is 392 Hz. When the weight is completely immersed in water, the new...