Statics Definition and 906 Threads

This is just an entry level problem from the second day of class. It isn't really dealing with statics but with just vector manipulations. I have included a copy of the problem and a partial attempt. Any help would be appreciated.

Homework Statement Determine The Centroid of The Area Homework Equations x_centroid = [(Area of each piece)(Centroid of each piece)]/(Area of each piece) The Attempt at a Solution This seems like a really basic problem, I am just reviewing for my statics final on saturday. The only problem...

Homework Statement Includes picture, download question http://docs.google.com/Doc?id=ajccwmhrc3rx_37gs2ht7g9" .Homework Equations The potential energy equation ends up being V = 1/2 k x^2 + W yThe Attempt at a Solution xspring = 2 sin(\Theta) ym = 2 cos(\Theta) V = 1/2*40 (2 * sin(\Theta))^2 +...

HELP!Statics problem Homework Statement A thin rod AB of length L=0.5m and mass m=1.0kg makes an angle of theta=60 degree with the horizontal. It is held in position by a horizontal light string attached at A as shown. A mass M is suspended from A by a second string. If the coefficient of...

Homework Statement Using a uniform strut, a rigid brace hinged at the floor, a person holds a 30-kg engine in equilibrium while it is being repaired. The strut has a mass of 12.5 kg. A smooth rope passes over a pulley at the end of the strut. (a) What is the force exerted on the rope by...

Homework Statement Image of problem: http://img227.imageshack.us/my.php?image=physics3ue4.png A 1229.0 N uniform broom of length L is supported by a cable. The broom is pivoted at the bottom, the cable is attached a distance (3/4)L from the pivot, and a 2442.0 N weight hangs from the brooms...

Hello guyz,i'm facing this problem in my statics class...and thought posting it here so i can get some help :) here it goes http://img372.imageshack.us/img372/6241/58856343aw8.jpg Ok this is what i did and I'm kinda stuck... just bare with me...

Homework Statement Each of the three cables can safely carry a maximum tension force of 14.1kN. Based on this criterion, what is the largest safe mass of the suspended ceiling? (unit: kilograms, kg) Homework Equations Sum of moments = 0 sum of forces in the x direction = 0 sum of forces in...

Homework Statement Diagram is attached. The mast OA is supported by 3 cables. If cable AB is subjected to a tension of 500N, determine the tension in cables AC and AD and the vertical force F which the mast exerts along its axis on the collar at A. a = 6m b = 3m c = 6m d = 3m e = 2m f = 1.5m...

1. What horizontal force F will pull the 100 kg lawn roller over the step? What is the value of F if it is directed normal to AC? I can't draw a picture for you, but i can describe it. There is a circular lawn roller in contact with a step that is 3cm in height. The roller is currently...

Homework Statement hey, I'm having issues with a problem, and my book doesn't seem to show me how to do it. so, i have a curve x = ky^2 and I'm to rotate it about the x-axis. I need to find the surface area generated. How do i use the first theorem to do this? Thanks for the help sorry...

Just figured I'd throw this up here. I was able to solve for the reaction at E when a=2 but when I tried for a=7.5, I wound up with something completely different. I was wondering what I'm not incorporating into the steps to solving this. Also, it says determine the reactions at A and E. The...

Diagram attached. The spring is unstretched when theta = 0. Determine the theta for equilibrium. I'm not quite sure how to get started here. My prof said that we cannot assume that the tension in the 400 N force cable at A is equal to the tension at the spring close to fixed support C...

Diagram is attached. P = forces M = free-moving moment C = looks like a pin connection L = distance between A and C, and C and B With the system in equilibrium. Question: Write the moment equations about point A, B and C and prove that they are all the same. so basically I end up...

I have been having trouble with this seemingly easy problem. You would think that it is just as simple as finding Fcos(tan-1(3/4)), which yields the answer 320 N. However, as seen in the image, the actual answer is 420 N. I would appreciate any help. Thanks

Homework Statement The jib crane is designed for a maximum capacity of 10kN, and its uniform I beam has a mass of 200kg. a)Plot the magnitude R of the force on the pin A as a function of x through its operating range of x=0.2m to x=3.8m. b)Determine the minimum value of R and the...

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 The linear spring exerts a force at each of its ends that is proportional to the amount of stretch it undergoes. The spring modulus (proportionality constant) is 2 N/cm and its natural (unstretched) length is 1.5 m. Find the normal and friction forces (a) between cylinders...

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...