A pin is a device used for fastening objects or material together, and can have three sorts of body: a shaft of a rigid inflexible material meant to be inserted in a slot, groove, or hole (as with pivots, hinges, and jigs); a shaft connected to a head and ending in a sharp tip meant to pierce one or more pieces of soft materials like cloth or paper (the straight or push pin); a single strip of a rigid but flexible material (e.g. a wire) whose length has been folded into parallel prongs in such fashion that the middle length of each curves towards the other so that, when anything is inserted between them, they act as a clamp (e.g. the bobby pin), or two strips of a rigid material bound together by a spring at one end so that, when the spring held open, one can insert some material between the prongs at the other end that, the spring allowed to close, then clamp the inserted material. According to their function, pins can be made of metals (e.g. steel, copper, or brass), wood, or plastic.
: Homework9-7
http://physci.kennesaw.edu/images/hm12-1.gif 1. A uniform beam of mass m is supported in a horizontal position by a pin and cable as shown in the Figure. Given. m = 20.0 kg ; M1 = 54.0 kg ; M2 = 37.0 kg ; L1 = 2.90 m ; L2 = 5.40 m ; and θ = 43.0°.
a) How many forces are acting on...
Member ABC is supported by a pin and bracket at C and by an inextensible cable of length
L 7.8 m that is attached at A and B and passes over a frictionless pulley at D. Assuming
P 450 N and 35 and neglecting the mass of ABC and the radius of the pulley, simplify
the problem as much as...
I've seen someone's solution in which they did the following:
$$600(200)-R_{AH} (600) = 0$$
How did they arrive at that conclusion by taking the moment about $A$?
Homework Statement
http://i.imgur.com/k8nq4HZ.jpg
So I need to assign IC pin numbers to the input and output of the logic gates.Homework Equations
None
The Attempt at a Solution
I only have limited knowledge on integrated circuits as a whole, so I'm pretty confused altogether. I know that I...
I have attached the problem as an image. I am unsure of how to draw the free body diagram of the truss structure. Would there be reaction forces in the Y-direction at the supports A and E? if there are, then the member AB would not be a two-force member. If there isnt, then Fy of the whole...
I have a compression fitting that I am using to bring power into a pressurized vessel. On the side exposed to the enviornment there are 2 14 AWG 24" long leads. This vessel is going to be under water. So I need a way of creating a waterproof connection to each of the 24" leads so I can have a...
I wanted to pose a question here. It's based off a real world situation that I witnessed and was wondering what some people had has opinions (... or good reasoning/math). There is a 27-ton crane which has four outriggers to distribute weight and a rear stabilizer (similar to outrigger in...
I would be grateful for any assistance
I'm attempting to calculate the load on the bushing in the kingpin post on this steering axle. I've uploaded a pdf of the assembly. The load would be perpendicular to the kingpin center line at the top and bottom of the bushing. I'm not certain how...
Hey guys :)
I'm working on a little bar magnet and compass simulation.
You can see my progress here: https://dl.dropboxusercontent.com/u/47501509/fysik/kompasser-och-magnet/index.html
As the title states I want to make the compasses wiggle a bit like a compass would do naturally.
What...
[b]1. Hi, The problem:
A roof support frame has various leadings on it. The frictionless pin joint at points A has vertical and horizontal reaction forces. The rollers at point B allow free movement in the horizontal direction and has a vertical reaction.
a/Calculate The total Horizontal...
Homework Statement
Double Shear Pin Connection
Homework Equations
∑Fx = -2V + P = 0
The Attempt at a Solution
When calculating the shear force along the planes of the pin, where I have a reaction at Ax and Ay, why do I have to use the magnitude of the reaction force as opposed to...
Can someone link a website or attach a picture of a chart distinguishing the differences between the stress risers in a shear pin (round circular shaft) with a V-notch groove versus if it was a rounded groove. I have been looking but can only find charts, tables and graphs for round circular...
I am working with a silicon PIN-type photodiode in photovoltaic mode, conducting measurements of open-circuit voltage and short-circuit current for varying intensities of incident light. The light is being measured as a proxy for another quantity, and so I must apologise for I can give no...
If you have a rod oscillating back and forth by a frictionless pivot point near the end of one side of the rod and the only external force is gravity, how would the magnitude and direction of the force of/on that pivot point be calculated? How does it change with the oscillations?
I am...
Homework Statement
Given force F (=5000N), find Moment on member 4.
I have attempted to start solving this problem by drawing the following diagram:
I added the letter 'A' to the support of member 2, and also put an angle of 7 degrees to the vertical at the support 1.
I have...
I've got a similar question to http://www.chegg.com/homework-help/questions-and-answers/pendulum-consists-10-kg-uniform-slender-rod-15-kg-sphere-pendulum-subjected-torque-m-50-n--q2722886 for homework. I applied the same steps I used on my homework question to this problem and I get a different...
Hi all,I just started to learn mechanics so please forgive me if i ask something elementary.I have an example from Egor P Popov's Engineering mechanics of solids.(Please refer attachment and sorry about quality of drawing).
This is a problem of a pin joint system subjected to vertical load...
Hi all,
I today learned that for pin design there is a parameter called,crushing stress,where the pulling force of the fork is divided over projected area,I learned that projected area was d*t where d was the diameter of the pin and t was the contact length between pin and the fork being...
Hi!
I came across an IC from Analog Devices - AD549, and happened to see a pin labelled as 'Guard pin'. It is being mentioned that the pin is connected to case.
I would like to understand more on the significance of this pin - its need and how to deal with it.
Also, is guard pin's need same as...
Does anyone know what the common technical name for the attached image of a spring loaded pin? I am pretty sure it is on the market, but not sure what it is called. Maybe you have used them before.
*Note: This is similar to some scaffold clamps, but it is spring loaded, while some scaffold...
Homework Statement
The rigid truss supports the loads shown. Find the reactions the pin A and roller D exert on the truss.
All concentrated loads act on the pins joining the truss membersHomework Equations
ƩMa= -5ft(3kips)-10ft(2kips)-.707(1kip)10ft+Dy(15ft)
Dy=2.80 kips*ft
The Attempt at a...
hello friends,
I am looking for a 6 Pin DPDT switch to which DC voltage will be given as input
My input DC voltage range is from 80V ~ 150V and dc current is less than 5A.
When i searched the internet i could only find DPDT switches with following ratings
125VAC/3A and 250V/2A
or...
I am looking at photos on google for DDR 140 pin and 248 pin DIMMs and they look the same.
The both have two notches on both the right and left sides and the pins on the bottum have the same notch in the same place I think.
Am I right?
If there is a uniformly distributed load due to gravity on a truss, how do I convert this into point forces on the three pin joints on the truss?
I am having trouble trying to work it out as I'm pretty sure there will be both forces in the x and in the y for each of the joints, but I can't...
I am connecting my towers power wires to the motherboard.
The motherboard tells me how to connect the. Hdd led cable. And were the pluss and minus wires go.
But the. Hdd led cable is mad of a. Blue and white wire.
Witch one is the pluss. And. Negitive?
Hey, I want to make a get better poster with led light sticking out of the poster. I found the following LEDs: http://www.play-zone.ch/de/bauteile/led/led-sortiment-mit-180-leds-oem.html . I have very little experience with wiring circuits (did AP physics a while back) and I'm not sure if this...
I work in valve manufacturing business, I have posted some questions on designs of pins before. Here is one I would like verified.
In a 400mm pinch valve I have the driving spindle fastened to the top pinch bar through a M36x4 thread. To secure the thread a drilled a hole and fitted a smaller...
Homework Statement
Refer to link for picture of problem.
http://session.masteringengineering.com/problemAsset/1127894/8/Prob.5-29.jpg
Determine the magnitude of force at pin A as a function of position d.
The mass of the weight is 700 kg and d goes from 1.7 m to 3.5 m
I have found Fbc...
So I have a 10 metre cantilever with a pin in the middle
There is a roller at the end and a UDL of 10 kN / m acting across.
Drawing the BMD is confusing me.
By my calculations; there should be a 50 kN load acting at the fixed end and roller.
Hence shape of the shear force diagram would be...
How bad are people at picking pin numbers? This article tells you how bad.
But then again, just looking at the picture of the two guys that thought the ATM was a urinal tells you how smart some people are.
8068 is the least popular pin number, so surely it has to be the best pin number...
Homework Statement
To test the deflection of the uniform 270-lb beam the 120-lb boy exerts a pull of 35 lb on the rope rigged as shown. Compute the force supported by the pin at the hinge O.
I have attached an image of the question.
Homework Equations
ƩMO = 0
ƩFx =0
ƩFy =0The Attempt at a...
Background: To prevent too much torque having to be transmitted through the gearbox on a gate valve, a shear pin is to be fitted between the hand wheel and the gearbox spindle. When a certain torque is reached the pin should rupture and no torque transmitted. See attachment for reference...
Homework Statement
Using the pin-jointed structure in the image:
a) Set up ALL equations of equilibrium for the structure.
b) Determine ALL reactive forces within the structure, including the directions and locations where they act.
I have attempted the problem however i can't seem to find a...
Guys when i study earthquake , they told me that the column stiffness is 12EI/L3 if column is fixed -fixed and 3EI/L3 if column is pin -fixed, so how they get this, i try to study stiffness Matrix and it gives you big matrix for frames not Only one factor like 12EI/L3
please explain
Deflection -- difference between pin and fixed joints
Hello all
I have a question regarding deflection. What is the difference between pin and fixed joint in frame l(first picture fixed the second pin),
I can summarize my question in points:
1.fixed connection introduces equal theta as...
Homework Statement
Find torque pin stress given:
Length is 5.5 ft
length from center to pins are 1.375 ft
length between pins is .667 ft
pin dia = 2.25"
The Attempt at a Solution
I am concerned about my calculation for torque pin force. Any suggestions?
I have a drum of radius of 1.375" with a wall thickness of .3025". It is rotating about its central axis at 2000 rpm. There are 6 holes drilled into the drum radially. I have a pin that slides in and out of those holes in order to release and stop the drum. I am trying to figure out the force of...
Background: To prevent too much torque having to be transmitted through the gearbox on a gate valve, a shear pin is to be fitted between the hand wheel and the gearbox spindle. When a certain torque is reached the pin should rupture and no torque transmitted. See attachment for reference...
Homework Statement
Determine the reactions at rocker support A and pin support B.Homework Equations
ƩF = 0
ƩM = 0
The Attempt at a Solution
ƩFx = 0: -Asin(25) - (800lb) + Bx
ƩFy = 0: Acos(25) - (500lb) + By
I'm getting thrown off because of the rocker on an incline.
Homework Statement
A fair ground ride comprises of a car, connected to an arm, secured to the main driver by a pin. It rotates about a vertical axis.
when operational:
a) what type of stress is experienced by the pin?, and what type of stress is experienced by the arm?
b) if the max allowable...
I am working on a circuit. I have an IC bridge rectifier in place for ac to dc conversion at the proper voltage and amperage. I understand that the nte 7077 voltage regulator is for regulating voltage at 110 volts + or - .8 volts @ 1 amp max. This is a 5 pin IC regulator. I do not understand...
Homework Statement
What is the distribution of stochastic variable X = "the number of attempts needed to find the correct last digit of a pin code"
Homework Equations
The Attempt at a Solution
I thought it was like this:
P(X=1) = 1/10
P(X=2) = 9/10*1/9
P(X=3) = 9/10*8/9*1/7...
Homework Statement
Draw a circuit diagram to show how the reset pin works.
Homework Equations
A high on this pin will reset the device.
The Attempt at a Solution
In the textbook it shows the ground branching out after the switch but before the reset pin. The textbook diagram shows...
Homework Statement
Designing a safety pin for gate valve, picture is attached! Material: EN24 (λ=680MPa and E= 207 GPa)
Total distance between supports = 98 mm! Force applied by gate is 64705 N! Question: Minimum diameter of pin for 1) No shearing , 2) a maximum deflection of 1 mm...
Homework Statement
View image for all details
Homework Equations
tao = V/A
The Attempt at a Solution
I went ahead and solved the force at BC and the x and y components at A, but I feel as though my solutions are incorrect. At BC I have F = 825 kN (up and to the left), A_x = 714.5...
A pin AB, 1cm long, is placed at an angle to the principal axis in front of a concave mirror, of focal length 5cm. Point B lies on the principal axis at a distance of 4 cm. Point A is such that the angle ABP is 60°, where P, the pole, is the point where the principal axis intersects the mirror...
Hello
I feel like I am overlooking some fundamentals when I am trying to solve/set up the equations to solve the following pin jointed problem. The only load on the system is at L. I ultimately need to solve all the reactions on the pins at A, B and the link at P (though I believe what is...