Tension Definition and 1000 Threads

a thin film of water has surface tension due to the strong bonds present on the surface in order to counteract the net downward force and this increases the potential energy of the surface layer of particles therefore on a hydrophobic surface it forms a water droplet , my question is since it...

These buckets are being suspended. The cords have no mass and each bucket is 3.5 kg. a.) Find the tension in the upper cord (T1) and the lower cord (T2) b.) If the apparatus is pulled upwards from the top of the upper cord, what are the new tensions of each cord? I understand the...

Homework Statement Two trucks tow a third one by means of inextensible ropes and a pulley attached to them (fig. 1). The accelerations of the two trucks are a1 and a2. What is the acceleration of the third truck that is being towed? (fig.1) is in this link (I'm sorry, I don't know how to post...

[mentor's note: Spilt from https://www.physicsforums.com/threads/tension-questions.852525] How does friction in a pulley or a rotating pulley change the uniform tension in a rope that was present in an ideal situation? Thanks!

While doing my coursework, I ran across two things regarding tension I do not understand. [Mentor's note: The second question has been moved into its own thread] The first is if a rope is attached at two ends, for example attached to two canyon walls with the rope over the canyon itself, why...

Hi folks, I'm a construction worker helping to destruct an oil platform out in the north sea, I often have to work out weights applied on lifting slings during cross hauling scenarios like the one drawn here, I know 2 ways of working this out already; 1 using a calculation of all the triangles...

1. Homework Statement I have to calculate the tension of AB beam and the mass. The force of beam BC is 200N 2. Homework Equations My work The Attempt at a Solution T=226.10 M=25.01

I am having a lot of difficulty understanding this concept. Suppose you have two objects A,B of mass A',B' connected by a massless rope. Let K Newtons be the force applied on object A .What is now the tension along the rope ? -My reasoning: K Newtons is the force applied to the combination...

Homework Statement Block A has a mass of 75 kg and is initially at rest on a frictionless inclined plane tilted at a 37 ° above the horizon. Block A is attached to a massless rope that is connected to the top of Block B by way of a massless frictionless pulley. Block B also has a mass of 75 kg...

Homework Statement [/B]there's an image of the situationHomework Equations [/B]F= mω^2 RThe Attempt at a Solution [/B]so, in the image there are two spheres that exerts a tension on the string using their centrifugal, since the centrifugal bodies are two I expect that the tension is the sum...

The uniform, 120-N board shown in Fig. 5-19 is supported by two ropes as shown. A 0.40-kN weight is suspended one quarter of the way from the left end. Find FT1, FT2, and the angle θ made by the left rope. Thank you for those who will give time and solve this problem. :)

Homework Statement A light inextensible string of length l hangs on two pegs attached to parallel walls separated by a height. A small frictionless pulley of weight Wp is attached to a block of weight Wb. When it is placed on the string, the string becomes taut and pulley runs on the string...

Hello, I have recently picked up drumming and the topic of tuning has peaked my interest. I have gone over numerous sources (academic theses, Wikipedia, HyperPhysics, etc.) trying to piece together what is occurring when drums (right now tom with two heads, batter and resonant, are of most...

Hi, I have a revision book that has an example in it for the tension on a rope if a 20 Newton force is hanging on the centre of a rope suspended between two points. The rope dips 25 Degrees either side. So effectively an upside down pair of right angled triangles is formed. The Hypoteneuse...

Homework Statement Homework EquationsThe Attempt at a Solution [/B]

I was asked to explain how different factors affect surface tension. I can understand how temperature plays a role. 1) Contamination: Increase in contamination decreases surface tension. I tried thinking about it.I thought maybe the particles that contaminate the fluid get in the way and...

Homework Statement Determine the tension cable A and B and the x , y , z reaction of the ball and socket joint at C . Homework EquationsThe Attempt at a Solution I let the reaction of ball and socket joint at C = Fx , Fy and Fz Sum of force in z direction : TA +TB +FZ= 400 Sum of force in...

Homework Statement I'm currently following the textbook Advanced Engineering Mathematics by Erwin Kreyszig. I'm learning the derivation of the Wave equation using the method shown in the book, but when I reached the final part of the derivation, the working just confuses me. (1/Δx)[ (u/dx)|...

I have attached a picture so that it is easier to visualize this problem. The information is all in it. The number scribbles are just my attempts to solve it: http://i65.tinypic.com/2qlbn9h.jpg The current topic we are on in class is Newton's Laws and we have covered moments and equilibrium...

I've read a couple other threads about this issue. And one even addressed my exact question but the answer didn't help me understand this at all. In an Atwood machine, why isn't the total force on a mass = its gravity minus the gravity of the mass on the other side? I keep seeing tension in...

Hello. I am having some trouble to understand conceptually the behaviour of such a system: So, both blocks are in contact with the floor, one has mass M and the other has mass m. Then we apply an upwards force F on the axel of the pulley. How does the system behave? My initial thought is...

Please find the attached (http://s23.postimg.org/ropds44ob/Capture.jpg). I know how to get the shear force for each bolt using bolt analysis. But I don't know how to get the tension/compression force of the bolt when it position is not symmetric. *I already download some excel from internet...

Homework Statement A model airplane has a small gas powered motor in it to allow it to fly. It is tethered its controller by a long cord. The plane will fly in a circle at the end of this cord around the controller who uses the tether to control the altitude of flight of the plane. Currently...

Homework Statement A transverse pulse is propagating on a 2.0 m long string of mass 50 g. The pulse is described by the equation: y(x,t)=pi/(pi+(3x/2+pi(t))^2) , with x and y in meters, and t in seconds. Find the tension in the string. Homework Equations y=asin(wt+thetha)[/B]The Attempt at...

Homework Statement A spider builds a web using 4 strands as support. Strand 1: 21mN [20°E of N] Strand 2: 16mN [60°E of S] Strand 3: 18mN [40°W of S] Determine the force of tension in strand 4 assuming the web is stable. Homework Equations r(cosθ) - N/S components r(sinθ) - E/W components The...

My question arises from trying to get the correct sign convention for a pulley that has two boxes attached by a massless rope. one box is to the left of the pulley and the other box is hanging down below the pulley. If I take the counter clockwise direction to be negative, and set up my...

Homework Statement What is the tension in a pendulum? Is T=mgcos(theta) or is T=mg/(cos(theta)) ? and is the x component of tension is mgsin(theta) and this is the restoring force? Homework Equations Fnet=ma Fg=mg The Attempt at a Solution Maybe it depends on the problem given? But I am...

Homework Statement Since the image is not clear ,the blocks on the left are 1 Kg(top) and 5kg(bottom) connected by a spring. On the right are 1Kg(top) and 2Kg(bottom) .The bottom right string is cut . Homework EquationsThe Attempt at a SolutionSuppose T1 is the tension in string AB , T2 in...

Homework Statement Homework Equations Fn - T = ma The Attempt at a Solution Fn-T=ma 810kg x 2.5m/s2 - T = 810 kg x -2.5m/s2 T=0

Homework Statement LETTER d only [/B] Homework Equations Fnet = ma The Attempt at a Solution So I considered 2m independently and set its net force equal to its gravity minus its tension. (2m)a = Fg - Ft = (2m)g - Ft I then rearranged the equation so that Ft = (2m)g - (2m)a = 2m(g-a)...

Homework Statement Is this correct? The sum of the forces in the Y have to be zero and there is only two y-components so it's pretty simple to determine this. There are also only two x-components so those will also cancel each other out as they have to go in opposite directions to balance as...

Homework Statement A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. Instead you set up a pulley system. A rope (consider it massless) runs from the seat you sit on over an ideal pulley and then to...

Homework Statement Hey guys. The other day I was doing some physics questions, studying for the finals, you know the story. Me and my friend came across this physics question where: There is a particle of mass 2kg (m) hanging by a mass-less string that went around a pulley with mass 4kg (M)...

Homework Statement A tugboat pulls two barges down the river. The barge connected to the tugboat, carrying coal, has an inertia of 2.2 × 105 kg, and the other barge, carrying pig iron, has an inertia of 3.5 × 105 kg.The resistive force between the coal barge and the water is 8.0 × 103 N, and...

Hi. I am having some difficulty with circular motion.An object is spun vertically on a rope a) when would the string be most likely to break? The object would most likely to break when it has the most tension, so at the bottom of the circle it is Ft-Fg=Mv^2/r which is (Ft=Mv^2/r + Fg) while the...

Homework Statement A car of mass (m) is attached to a cable of length (L) to a rotating pole. The car will speed up and travel in a circle. If the maximum speed of the car is vmax, what should the minimum strength of the cable connecting the car to the pole be? Note the surface is not...

Homework Statement An 11 kg traffic light hangs fro ma structure as shown. The aluminium pole AB is 7.5 m long, and weighs 8 kg. Determine the tension in cord CD Homework Equations T = rf[/B]The Attempt at a Solution Ignore the AC height of 3.8 m, and replace it with an AD length of 7.5...

Hi, I need some guidance on the following problem, please. A daredevil attempts to walk the full length of suspended. A 20 kg wrecking ball hangs at the end of this uniform beam of length 4 m and mass 10 kg and is attached to a hinged wall at an angle of 53 degrees. A cable attached to the wall...

Homework Statement A child pulls a friend on a sled. The child maintains a constant tension of 29.4 N in the rope. The combined mass of the friend and sled is 30.0 kg, and the coefficient of sliding friction between the sled and snow is 0.1. How far can the child pull her friend in 6 sec...

Hello this is my first question here :) So here is my problem: We have a circle radius 50 (m), made out of iron wire mass 5.506206591207348477884587 Kg per meter of rope. Rope diameter 11/8 inces or 3.4925cm The wire rotates with 3 rpm in zero gravity 1)How can i calculate the tension? Thx...

Homework Statement A 4.5-kg bowling ball is perched on a concrete ledge directly below your dorm room window, with the side of the ball opposite the holes touching the wall. Wanting to hold the ball in place so that it doesn't roll off and land on somebody, you manage to hook one of the holes...

Homework Statement So In this problem, I have two strings, one string pulls with pounds and is 30 degrees away from an imaginary line straight down of of the two strings and there are no variables or degrees given for the second string. The weight is 20 pounds. I have been looking at this...

Homework Statement the cord shown have supports a force of 500N and warps over the frictionless pulley , determine the tension in the cord at A and the horizontal and vertical component of reactions at A . Homework EquationsThe Attempt at a Solution for the moment about A , the author gave...

Homework Statement Hi all. What concerns me here is that it's worth 10 marks, but the solution I've tried only takes 2 steps. Am I missing some relation between the frame support and the pulley altering the components of the tension, or is the solution really just a basic trig conversion...

For question about the falling object we will always take T=mg+ma so we take mg and ma positive for question about the object rolling down the inclined plane we will say that mg sin theta - ma=0 although mg sin theta and ma is still on the same direction, we take mg sin theta positive but we...

Homework Statement Identical ropes were tied to two trees, and two men, A and B, started shaking the free ends at the same instant a short while ago (Figure 1) . Which rope has the greater tension? Which man is shaking with the greater frequency? Homework Equations T=1/f λf=v The Attempt...

Homework Statement Homework Equations My assumption:- if one of the ropes have been cut, it mean the object just hang VERTICALLY with one rope with 5N load on it.Is it my assumption is correct? The Attempt at a Solution Tension of the other rope = 5N (is it correct)?? base on my assumption...

Hi all, I am doing a High Velocity Impact testing using a gas gun I have to figure out a) is my test running well and I am not getting any reflection? Please correct me or help in calculating if I am wrong at any point. I guess, I can figure out by calculating the time required for the...

Homework Statement An object with a mass of 18 kg is suspended from 2 cables as shown in the below diagram. The tensions in the cables are T1 and T2. a) Draw a free-body diagram for the object. (already solved) b) Find the tension in both ropes, T1 and T2. (already solved) c) If string 2 were...

If a string can handle a max tension of 85 N what is the largest mass that could be lifted with this string if it is lifted with an acceleration of 2.0 m/s^2 up on the moon? Let up be positive in value. Ft = - 85 N, a = 2.0 m/s^2, Fg = -1.6 m/s^2 Homework Equations F = ma -> Fg = mg -> Ft =...