Statics Definition and 888 Threads

Homework Statement If engine 3 suddenly fails, determine the resultant of the three remaining engine thrust vectors, each of which has a magnitude of 90kN. Specify the y and z-coordinates of the point through which the line of action of the resultant passes. The Attempt at a Solution...

I have a couple problems that I can't seem to get. The first I'm really close, I can tell, because my professor did one that was similar in class. The answer the book gives is 250 lbs, I'm coming up with 225. The second I think is similar to another problem he did in class but I'm not...

Homework Statement The 64-m-tall tower is supported by three cables that exert forces Fab,Fac,Fad and on it. The magnitude of each force is 2.52 kN. Express the total force exerted on the tower by the three cables in terms of components...

In general, how would you find the moment of a force given: the magnitude of the force two coordinates that form a line that contains the force vector the pivot point using Varignon's Theorem

Homework Statement "A derrick boom is guyed by cables AC and AD. A worker is lifting a 20kg block by pulling on a rope that passes through the pulley at A. Knowing that the boom AB exerts a force A that is directed from B to A, determine this force and the force in each of the two cables."...

Homework Statement Three forces are applied to a bracket. The directions of the two 30-lb forces can vary, but the angle between these forces is always 50. Determine the range of values of  for which the magnitude of the resultant of the forces applied to the bracket is less than 120...

Homework Statement Collar A can slide on a frictionless vertical rod and is attached as shown to a spring. The constant of the spring is 4lb/in., and the spring is unstretched when h=12in. Knowing that the system is in equilibrium when h=16in., determine the weight of the collar. Home-made...

I have a statics question. In my book under a picture it says. "To save material the beams used to support the roof of this shelter where tapered since the roof loadings will produce a larger internal moment at the beams' centers than at their ends." picture...

Has anyone tried engineering mechanics: statics by hibbeler? Is this a good book? From the reviews on the 10th edition people said that it lacked examples. But there aren't many reviews on the 11th edition?

So, I've been trying to figure this problem out for a good part of the day. If anyone could help me out or give me some guidance I would really appreciate it. I basically have a long cylinder sitting on some compression springs. The bottom of the cylinder is hollowed out and the springs are...

Here is the setup to my question: You have a long table supported by two legs (think of the table as two-dimensional. in the real 3D table each "leg" could be a pair of legs, one behind the other). The tabletop is massless, but has some massive books sitting on it at various places. You want...

I am currently attending WVU and was wondering if anyone could tell me where I could take engineering statics online. thanks

Im doing this problem as a part of the experiment for a Basic Roof Truss. I first started off measuring the deflection for each member of the roof truss (member dismantled from the roof structure) by applying certain amounts of weights. Next I put all the members up into a roof structure as...

A big HI to everyone in the forum. I am new to this awesome forum. Perfect for my engineering studies! :) Anyway, here's my problem. The cords BCA and CD can each support a maximum load of 500N. Determine the maximum weight of the crate(A) that can be hoisted at a constant velocity, and...

Here's the problem: http://img187.imageshack.us/img187/5958/showmenq5.gif A block of mass m1 = 1 kg rests on a table with which it has a coefficient of friction µ = 0.52. A string attached to the block passes over a pulley to a block of mass m3 = 3 kg. The pulley is a uniform disk of mass...

Hey, I'm wondering if anyone could possibly explain to me how to find the tension forces present in a problem consisting of: A composite shaped plate, being hung by two wires. First the problem asks to determine the center of gravity/centroid of the shape, then to determine the Tension forces...

cant find an equation for this one.. there is no theta soo i don't know what to do A uniform ladder whose length is 5.8 m and whose weight is 380 N leans against a frictionless vertical wall. The coefficient of static friction between the level ground and the foot of the ladder is 0.54. What...

What is the easiest way to determine the two force member in a frame question? When I look at a frame and see the pinned connections, I automatically assume that there is a reaction in the x and y directions. How can I tell at which pin there is only one reaction, and what direction it is...

Statics problem i have been working on this problem now for 2 hours and haven't gotten anywhere, taking the moment around joint a or b still leaves you with 2 unsolved equations. and suming the forces leaves with 2 also can anyone point me in the right direction, i just need to determine the...

Homework Statement Determine the force in member HE for the truss in the figure. All members are length 0.8m except GH. The Attempt at a Solution I solved for the reaction forces at G and got Gx = 1039 N , Gy = -1200 N, A = 1800 N. My professor said to then draw a FBD of G and solve for...

Homework Statement Determine and locate the resultant R of the two forces and one couple acting on the I beam. ---x ====|====O====| I understand this is kind of hard to understand this is the best I could do "====" = 3 ft first | = 6kN force upwards O= couple 52kN m ccw second | =...

Hey guys, Im doing mechanics and statics at a university grade level as part of my product design course (currently in year one). Can anyone recommend a good book as the one that i saw not only had tiny font that i couldn't read easily, but also was written in such a way as to send you...

Homework Statement The problem is the following; Three smooth homogeneous cylinders A, B, and C are stacked in a V-shaped trough. Each cylinder has a diameter of 500 mm and a mass of 100kg. Determine the forces exerted on cylinder A by the inclined surfaces. Homework Equations This...

Homework Statement please find it attached as pdf. Homework Equations joint method was conducted. The Attempt at a Solution please find it attached. i spent so much time on this and i took statics like 1.5 years ago. can you help me find my mistake? i can't seem to find why...

Homework Statement A 3.0 m long rigid beam with a mass of 130 kg is supported at each end. A 65 kg student stands 2.0 m from support 1. How much upward force does each support exert on the beam? http://i241.photobucket.com/albums/ff4/alg5045/p13-56.gif Homework Equations Net Forces =...

Homework Statement this is a picture of an example from the book. I am going off of it to solve a problem that will be on my test tomorrow. i can figure out how to calculate the shear force and moment of each section (though i don't fully understand it), but I am just not getting how they...

[SOLVED] Simple Statics Equilbrium Homework Statement A diving board of length 3m is supported at a point 1m from the end and a diver weighing 450N stands at the free end. The diving board is of uniform cross section and weighs 285N Pic: http://img408.imageshack.us/my.php?image=yf1124no0.jpg...

I am working on a statics project and need a little help on what to do next. A link to the project diagram and description is below: http://i227.photobucket.com/albums/dd178/ftballguy8282/Statics2.jpg I've simplified the distributed load on top of the bridge to: 2400 lbs above point A...

The end links of a uniform chain can slide on a fixed rough horizontal rod. Show that the ratio of the extreme span to the length of the chain is mu log{[1+(1+mu^2)^(1/2)]/ mu} Please help me!

A uniform cylinder of radius a and weight W rests in equilibrium between 2 rough planes which are both inclined to an angle pi/6 to the horizontal. The axis of the cylinder is parallel to the line joining the two planes and the coefficient of friction at both points of contact is 1/2. Find...

I'm really stuck on these two problems: 1) Two equal uniform rods AB BC are smoothly jointed in B and they're in equilibrium. The end of C lies on a rough horizontal plane and the end of A is freely pivoted at a point above the plane. If alpha and beta are the angles of CB and BA with the...

A 3.0 m long rod has a density described by = a + bx, where is the density in kilograms per meter of length, a = 5.0 kg/m, b = 5.0 kg/m2, and x is the distance in meters from the left end of the rod. The rod rests horizontally with its ends each supported by a scale. What do the two scales...

Im so lost in Statics :( :( HELP! first of all i need to say that i do not go to a school that is known for its sciences. this of course means that we have crappy science teachers because our budget is very low. my teacher is horrible at explaining the material and whenever i ask him a...

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...