Statics Definition and 888 Threads

Just joined PF and my mind is completely shutting down on me. I need to design the base of a halogen desk lamp and am having a problem getting started. My biggest problem is finding the correct equation to use to begin calculating the numbers. It is a three dimensional problem. Can someone...

There are 100 envelopes in a box. Each envelope contains a different number. The numbers could be large or small, rational or irrational - anything goes as long as they are all different. Among all the envelopes in the box, the one with the largest number is the winner. If you turn it in, you...

Homework Statement Find coefficient of static friction if shell starts to slip at θ = 60° known - θ unknowns - P, r, Normal force, weight Homework Equations friction = μ * normal force The Attempt at a Solution I do not know where to start. It looks like the picture wants you to...

Homework Statement A gymnast with mass m1 = 48 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 121 kg and length L = 5 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the beam. 1)What is the...

Figured it out.

Homework Statement The beam is subjected to two oppositve vertical forces and one horizontal force as shown. Determine the reactions at the supports A & C Homework Equations \sumforces in plane = 0 moment = force x perpendicular distance The Attempt at a Solution \sumY = 15 + RyC + RyA - 15...

Homework Statement So I am designing the suspension for a small formula car. It's a pushrod suspension much like what is shown below: [PLAIN]http://f1-dictionary.110mb.com/Images/pullrod_poshrod_push.gif I am trying to find the required tubing diameter for the loads the car will experience...

1.find the force in members AB BH OH 2. the forces at O is 3000 lb at O, 5000 lb downward on A and 1000 lb -x direction at A. and 7000 lb -y direction at C. reaction forces at D and E are statically indeterminant. 3. sorry for the crappy sketch. I've gotten AB correct taking...

PROBLEM 1 Homework Statement The frame in the figure is supported by a hinge in A and a roller in G. It is loaded by a couple = 14 kN*m in B, a force = 12 kN in D and a distributed force = 4 kN/m on section EG. = 1.4 m. Calculate the normal force in C. Use the correct signs...

Homework Statement A man having a weight of 150 lb supports himself by means of the cable and pulley shown in the figure. If the seat has a weight of 15 lb, determine the force that must be exerted on cable at A, and the normal force the man exerts on the seat. Answers provided by the...

Homework Statement Determine the tension in cables BC and BD, and reactions at the ball-and- socket joint at A for the mast shown in the figure. Answers are given by the teacher for checking purposes: TC=707 N; TD=1500 N, Ax=0 N, AY=0 N, AZ=1500 NHomework Equations ƩMx=0 ƩMy=0 ƩMz=0 ƩFx=0...

http://imageshack.us/photo/my-images/267/unledghj.png/ There are short links at A, B, and C. They're asking for the forces in the members of the truss. I've solved this problem, but only by also finding the support reactions at the short links. Is it possible to find the forces in the members...

Homework Statement Homework Equations A 50 lb force is applied to a corner plate as shown. Determine an equivalent system consisting of a 150 lb force at B and another force at A. The Attempt at a Solution There is an algebraic solution to the problem, but I was wondering if it...

Homework Statement Supposed to support a 50 kN weight at a pin joint at the center of a void as cost effectively as possible using trusses (e.g., trusses and pin joints have costs) Homework Equations Basic sum of moments and sum of forces = 0 The Attempt at a Solution Why can't I...

1.find the force exerted on member abcd by the pin at b 2.ƩM=0 ƩF=0 3. sorry for the light colors, its from my office onenote. this is what I've got so far, i wanted to make sure I am on the right track or not

the problem has been solved, thanks.

http://i272.photobucket.com/albums/jj198/1000_2008/sgsdfgsfsd/Capture.jpg" I just had a question regarding the determination of force P on the body of water CDE. For weight P, they used 1/2(18ft)(1ft)(18ft)(62.4lb/ft^3). I understand that this is because we are using volume*specific weight...

Homework Statement [PLAIN]http://img830.imageshack.us/img830/1091/unled2cjt.jpg Homework Equations I used sum of forces in x y direction and sum of momentsThe Attempt at a Solution So my problem here is that I solved for Ay (1275.3N) and now I have to solve for T The obvious approach would be...

[SOLVED] Charged particles deflecting in a statics question. Homework Statement A particle mass 2g and carrying a charge of q is suspended from a light, insulating thread. A second particle carrying an equal and opposite charge is held near to the first particle in the same horizontal plane...

Here is my question: http://imageshack.us/photo/my-images/31/unledasm.png/ On this figure, there is a 50 N force on the bigger pulley. When summing up the moments about the x-axis, why isn't -50(0.15) [circled on figure] the same as (-50cos45)(0.15) + (-50sin45)(0.15), which is the sum of the...

I know I am missing something simple here. This is only the second problem and I have done the rest with no problems. I would appreciate a second set of eyes. Homework Statement The mass center G of the 1430-kg rear-engine car is located as shown in the figure. Determine the normal force...

Homework Statement If cable AB is subjected to a tension of 700N determine the magnitude of the vertical force F in N. Pic: [PLAIN]http://img225.imageshack.us/img225/9823/capturespm.png Homework Equations Sum of forces in x y and z direction The Attempt at a Solution I am...

Homework Statement Here is a link to a picture of the problem http://img571.imageshack.us/img571/374/truss.jpg" I have to find the forces in the members marked with an x. 2. The attempt at a solution I found the support reactions, but I'm not sure if I need them. Should I try to find the...

1. If cylinder E weighs 30lb and theta = 15 degrees, determine the weight of cylinder F 2. Sigma F = 0 (Statics question) 3. I have gotten my separate components but I don't know how to solve the equations this sounds really stupid since I'm in calc III and physics II but my brain is just...

Homework Statement [PLAIN]http://img846.imageshack.us/img846/6546/statics.png Homework Equations Fy = F*cosθy Fh = F*sinθy Fx = Fh*cosφ = F*sinθy*cosφ Fz = Fh*sinφ = F*sinθy*sinφ The Attempt at a Solution I'm having a lot of trouble drawing vector AD in a free body diagram. I think I...

Homework Statement [PLAIN]http://img28.imageshack.us/img28/2106/241s.png Homework Equations ΣF = ma The Attempt at a Solution I'm really confused here, is using ΣF = ma even possible to find the tension here? Or do I have to utilize some other method, like law of sines?

Homework Statement A crate is stuck in quicksand. The man trying to get the crate out of the quicksand thinks that a force of 2700 N applied in the direction r2 will be sufficient to get the crate free. The crate also has a cable attached to it that is connected to a mechanical crank in the...

Please help Due in 2 hours. Statics machine equilibrium: reactions- too many unknowns Homework Statement The woman using the lat pulldown machine is holding the 80-lb weight stationary in the position shown. What are the reactions at the built-in support E and pin support F? (A and C are...

I'm a little nervous about this fall's statics class. It seems to be a lot more rigorous than my intro physics course, and I'm not sure I'm prepared. Does anyone have any pieces of advice on learning engineering statics?

Homework Statement Bar AB of negligible weight is subjected to a vertical force of 600 lb and a horizontal force of 300 lb applied as shown in the figure. Find angle THETA at w/c equilibrium exists. Assume smooth inclined surfaces. Homework Equations What is the value of angle...

I can seem to get the answer of 60N and 125mm from C Thank you for the help

Here's 2 simple questions :) 1) Should I take Physics I or Statics first? 2) Should I take them together? As a side note, I've only taken Calc I and Calc II...I plan on taking Diff Eqs along with the above in the same semester. Thanks for any opinions on this! Shane

This question was on my mechanics test but I skipped it. It seemed kinda crazy. Homework Statement In the drawing is described a weightless beam AC connected to the wall through joint C. The beam is supported by two cables, BE and AD, connected to the wall. At the end of the beam at...

Homework Statement [PLAIN]http://img15.imageshack.us/img15/7379/unledtzc.png (The rods are of length L, there is no friction, massless rods, yadee yadee yada) At a certain angular speed \omega, the counterweight performs uniform circular motion. Show that \omega and \theta are related as...

I don't have the solution manual answer for this problem, can anyone help please confirm my answers are correct? Homework Statement http://img860.imageshack.us/img860/6118/40893341.jpg On a smooth horizontal weightless surface ABDC acts at the center a vertical force of 600 [N]...

Homework Statement http://img860.imageshack.us/img860/6320/tthing.jpg In the drawing is described a beam structure fixed at point C, and held by a cable BD to the floor. The beam is loaded by two concentrated forces, F1 and F2, as described in the drawing. Given F1 = 700 [N] F2 =...

Homework Statement Determine the forces acting on member ABCD The 100 lb force acts horizontally at point D, the large, bold circle is a wheel, and the smaller, less bold circles indicate pins connecting the members. Member BE is solid. I forgot to label point F in the picture...

Do I have to do three 2D free-body-diagrams like I did here -> https://www.physicsforums.com/showthread.php?t=503368 Or is there a shortcut?

I've kicked it up a notch and tried tackling 3D statics :approve: Homework Statement http://img849.imageshack.us/img849/4640/attempt01drawing.jpg A rectangular board is held in the condition shown in the drawing by clutching devices A and B (I couldn't find the exact translation in Hebrew...

In my practical engineer degree for mechatronics, our technical mechanics test consists of 80% statics questions and 20% dynamic questions. I'm curious, why does statics appear to be more important than dynamic in this engineering discipline?

please I need help -- engineering statics summerschool hi guys I'm a junior student majoring in EE and I'm looking for an online engineering statics for the summer quarter/semester. I'll be working in the summer, and my school doesn't offer the class till next year. I have been looking for 3...

http://imageshack.us/photo/my-images/217/unledsdb.png/ So in the picture, we have a radio tower supported by a cable. W is the weight of the radio tower, Fw is the force of the wind, and T is the tension from the cable. I want to clarify if Fv (a vertical force) is also the normal force on the...

[SIZE="3"]Please help PROBLEM Cable AB supports a load distributed uniformly along the horizontal as shown. The lowest portion of the cable is located at a distance a = 3.6m below support A, and support B is located a distance b = na above A. -> Determine the maximum tension in the cable as...

The X axis in the first diagram is in line with the surface, but when you isolate BC it doesn't have to be. Notice how when we isolate BC our angles our different. Who's correct? Homework Statement http://img192.imageshack.us/img192/236/objectthingy.jpg The object is in static equilibrium...

Homework Statement During the weight-in of a truck it's been determined that the load of the weight acting on the front axis and back axis are 18 [kN] and 12 [kN] correspondingly, when the truck is empty as shown in the diagram. The max load allowed on every axis is 40.Calculate the size of...

Homework Statement I have a project for my statics class. My topic is equilibrium of a rigid body, and I am building an assembly that will have four different support reactions. They will all be attached to one central post for ease of construction, but they will be analyzed as separate...

So I got everything right other than Rd (the end). I personally think there's a mistake in the solution manual. Homework Statement Basically these are all pin joints, even the "hydrolic cylinder" (CD) is weightless and connected by pin joints, so the fact it's called or drawn as...

Homework Statement http://img841.imageshack.us/img841/4725/device01.jpg (I hope I translated it correctly, this has some technical terms...) This device is used as a key for installing a disk on a stational shaft, O. The device is equipped with pins A and B, that goes into the holes of the...

Statics, moment of inertia simple square-shape...need help (no calculus) Homework Statement Calculate the moment of inertia to the central axes Xc and Yc for the sketched cross-section. Xc = 33.9 mm Yc = 150 mm http://img822.imageshack.us/img822/1303/97823499.jpg Uploaded with...

Statics - It seems simple, but there must be a catch... (Sorry if I'm overasking for one day. Clearly I'm doing a marathon of statics exercises today and you're all super helpful ^^) Homework Statement This structure is made out of 2 weightless parts, BCD and AC, connected by joints. At...