Tension Definition and 1000 Threads

Homework Statement The problem: Two blocks made of different materials connected together by a thin cord, slide down a plane ramp inclined at an angle θ to the horizontal as shown in the figure (block B is above block A). The masses of the blocks are mA and mB and the coefficients of...

Homework Statement I am given the weight (force) of the rope as W. It sits on a cone about halfway down, with the cone's top angle ø. Radius at a given placement is r, and h is our height at a given placement. I need to find the tension, T, in the rope. Homework Equations W=mg Integral (F *...

Problem Statement: Attached in pic. Find the tension between the wire of two charges. My attempt: So basically idk how to account for tension and thought you can just use the E-Force between the two charges in the direction towards the E-Field. How do i account for the tension? In which...

Homework Statement Christian is making a Tyrolean traverse as shown in the figure. That is, he traverses a chasm by stringing a rope between a tree on one side of the chasm and a tree on the opposite side, 25m away. The rope must sag sufficiently so it won't break. Assume the rope can...

I need to know a realistic minimum biaxial tension per unit length - in N/m - for the surface of a membrane which is 27.4 mm square - with surface density 0.0912 kg/m^2 - so that it could be vertical and remain tense so that mode shapes due incoming acoustic energy would remain intact (if the...

19. In a tug-of-war, each man on a 5-man team pulls with an average force of 500 N. What is the tension in the center of the rope? (a) zero Newtons (c) 500 N (e) 5000 N (b) 100 N (d) 2500 N My answer was 2500 N as that is teh force pulling the rope, why the answer is 5000? are we...

A rope is wrapped around a pole with one end attached to a large object and the other end pulled with a tension T. The rope does not slip. I am confused why the tension varies within the rope. How would I know that the static friction force is non-zero?

Homework Statement I need help on understanding a little part of the solution to this problem I've found on the internet. The problem Homework Equations Surface tension and pressure equations The Attempt at a Solution The solution My doubt: "The other component of the...

Homework Statement Hi all! I was wondering what the tension is in the string of a pendulum, because I think sparknotes is wrong on this. Sparknotes says that: "Choose a coordinate system: We want to calculate the forces acting on the pendulum at any given point in its trajectory. It will...

Homework Statement What is the tension in a 3kg block at a point 10cm from its left side, when pulled by a string from its right side with a force of 12N The block is 30cm. Homework Equations The Attempt at a Solution So it's pretty obvious the acceleration of the block is 4 ms-2...

For some reason I couldn't answer this, and I hope you can help me: a) Two people pull on a rope, one with 200 N , the other 100 N. Why is the tension on the rope the shared magnitude of both forces? b) If two people pull on a rope with equal force (say, 100 N), each person pulling feels...

When 2 unequal vertical forces act on the 2 ends of a vertical rope, how do I calculate the tension at the midpoint? First I calculated the net acceleration of the rope, then I choose any 1 half of the rope for fbd of it and then where and how does the tension act?

Homework Statement While going over the exercises in my mechanics tutoring sheet I found that one of the problems' stated answer didn't make sense to me (it's apparently from a textbook): A weight of mass ##m## is fixed to the middle point of a string of length ##l## as shown in the figure...

Homework Statement Two blocks shown in figure are connected by heavy uniform rope of mass 4kg. An upward force of 200N is applied as shown. (a)What is the acceleration of the system? (b)What is the tension at the top of heavy rope? (c)What is the tension at the mid-point of the rope?Homework...

Homework Statement A heavy box weighing 25kN is to be lifted by 2 overhead cranes with cables inclined at 40° and 30° with the vertical respectively. i) Find tension in each cable during lifting. ii) Due to safety concerns, the tension T2 in second cable is to be minimized. Find the angle...

Hi all! I am currently conducting an investigation into the way in which frequency varies when you change the tension on a guitar string. I am aware of Mersenne's laws, and that frequency should vary in square root proportion to tension. I'm looking for an explanation that goes beyond simply...

Will the tension at various points of a wire rope remain same when subjected to tension? for example let us assume that a wire rope is pretensioned and held between to fixed supports .So will the tension remain the same at the center and either of the anchorage points.

Homework Statement Acrobat-dude swings two cups of liquid which are attached to ends of a string. He swings the two cups by holding onto the middle of the string. The acrobat then releases his hold on the string and the question asks what is the tension in the string at this point. The...

A crane lifts the 18,000-kg steel hull of a ship out of the water at constant velocity. (A) Determine the tension in the crane’s cable when the hull is submerged in the water. (B) Find the tension when the hull is completely out of the water. I would have thought that B would just be...

Homework Statement The 135-N uniform beam from which 14-N wooden blocks are suspended is pinned to the ground. The beam is then supported by a cable (attached at the center of the beam) to allow the blocks to hang freely. If the blocks are attached two-fifths and three-fifths of the way...

To what I know, surface tension is a force that appear at the interface between 2 bulk phases, and is parallel to that interface. Let consider a bulk of a fluid in the air. In the bulk of a fluid at rest, two sub-parts of a fluid exert a attractive force on one another due to surface tension...

Homework Statement In a test of machine-part reliability, a specimen of mass m is swung in a vertical circle of constant radius .75 m. When the object is at the bottom the circular path, the tension in the supporting wire is found to be six times the weight of the object. Determine the...

hey, I'm currently going through a mechanics course on edx.org . And part of last's week homework was this problem. well okay I don't know how to add images so I'm going to try my best to describe it. There is a platform has a mass of 200kg. From that platform a rope hangs( with tension TA...

Homework Statement The diagram shows a system of two blocks suspended by ideal strings and pulleys. If the tension of the string attached to block m1 is T, what is the tension of the string attached to block m2?Homework Equations Due to conservation of string, a1/2 = a2 Force balance on mass...

I am building a shock damper for various weights which will be added at Mass D below. What I need to calculate is by how much would I need to turn my adjusters thus changing the angle of the spring, which in this case is 14.9 Kg rated, to allow for different weights to remain at a level...

A 17.0 kg monkey hangs from a cord suspended from the ceiling of an elevator.The cord can withstand a tension of 220 N and breaks as the elevator accelerates. (A) What was the elevator’s maximum acceleration before the cord breaks? (B) What is the tension in the string if the elevator...

I'm having trouble with the concept. I have two questions. According to various internet posts, the force of gravity of the masses attached to the Atwood machine does not act on the rope whatsoever. Is this correct? It is kind of confusing to me, because the rope is attached to these...

Homework Statement A metallic chain with a length ‘l’ andd whose ends are joined together is fitted onto a wooden disc as shown in the figure.The disc rotates with a speed of n revolutions per second.Find the tension of the chain T if its mass is m. Homework Equations The Attempt at a...

Homework Statement A 82 kg sled is pulled forward from rest by a snowmobile and accelerates at 2.0 m/s2 [forward] for 6.0 s. The force of friction acting on the sled is 120 N [backwards]. The total mass of the snowmobile and driver is 460 kg. The drag force acting on the snowmobile is 540 N...

Homework Statement The length of a stretched string is 1m. Its mass per length is 2x10-3kg/m. The string resonates at its 4th harmonic at 400Hz. (a) Calculate the velocity of the string wave. (b) Calculate the string tension. Homework Equations fn = nv / 2L v² = F / μ The...

So, the way I understand this is as follows : The alveoli (pretend they're bubbles) have diameters of the order of microns implying a massive pressure required to inflate them by the Young-Laplace equation. p_{in}-p_{out}=\frac{2\gamma}{r} However, the presence of pulmonary surfactant...

I get the theory: Fc = Ft + Fg Uniform circular motion, in the vertical plane. Fc = net force = centripetal force Ft = force of tension in the string Fg = force of gravity so at the top, with vector addition: Ft = Fc- Fg And if we define 'up' as positive, then should the equation look like...

Hello guys, Iam doing a project to find the tension of timing belt using a dial gauge indicator(consists of plunger and gear attached to it ie;rack and pinion mechanism) ,but i can't find a formula relating the displacement of the pointer and the tension (eg: 5° of dislplacement of pointer =...

Homework Statement A 30Kg neon sign is suspended by two cables, as shown. Three neighbourhood cats (5.0 Kg each) find the sign a comfortable place. Calculate the tension in each cable with the cats are in the positions shown. Homework Equations xCM = m1x1 + m2x2 ...

Hello guys, Iam doing a project to find the tension of timing belt using a dial gauge indicator,but i can't find a formula relating the displacement of the pointer and the tension (eg: 5 deg of dislplacement of pointer = 10 units of tension).Please help me...

A rope is used in a tug-of-war between two teams of five people each. Both teams are equally strong, so neither team wins. An identical rope is tied to a tree, and the same ten people pull just as hard on the loose end as they did in the contest. In both cases, the people pull steadily with no...

Homework Statement A light string is wrapped around a solid cylinder and a 300g mass hangs from the free end of the string. when released, the mass falls a distance of 54cm in 3.0s. a) Calculate the tension in the string. b) Calculate the mass of the cylinder. Homework Equations...

Homework Statement In the figure, M2 has more mass than M1 and M1 has more mass than M3. The questions refer to the magnitudes of tensions and weights. There is friction between the horizontal plane and M2 (μk ≠ 0). M2 is observed to travel at a constant speed. Assume that the pulleys are...

Homework Statement Figure shows a section of a cable car system. The maximum permissible mass of each car with occupants is 2800 kg. The cars, riding on a support cable are pulled by a second cable attached to the support tower on each car. Assume that the cables are taut and inclined at θ=...

An interesting blog post arguing the reason that BICEp 2 and PLAnck are in tension is becuase BICEP 2 underestimated galactic foreground emission. http://resonaances.blogspot.co.uk/2014/05/is-bicep-wrong.html

Homework Statement A loop of cotton floats on the surface of some water. A little detergent is dropped onto the water surface inside the loop, and the loop opens out and becomes circular. Explain why this happens. Draw a diagram showing the forces acting on a short length of the circumference...

Homework Statement PART A only Homework Equations The Attempt at a Solution The answer suppose to be mg sin theta- t cos alpha = 0 ( Newton's law). 15g sin36.9 = t cos 30 However, why don't we need a force of static friction?

Homework Statement PLEASE click on attached picture below: What can be concluded about the tension in the cords holding the balls stationary in Systems I and II when both systems are at rest? In both systems the mass of the larger ball M2 is exactly twice the mass of the smaller ball...

1. Homework Statement [/b] A block with mass M = 5kg sits at rest on a frictionless incline. The mass is connected to the wall by a string with linear density μ = 5.0 g/m. The incline is fristionless, with angle Θ = 30°. Let the positive x-direction point up along the incline, and let the...

Homework Statement A yo-yo of mass M is composed of two disks of radius R separated by a shaft of radius r. A massless string is would on the shaft, and the loose end is held in the hand. Upon release the yo-yo descends until the string is unwound. The string the begins to rewind, and the...

Homework Statement Some kid is playing with a yoyo of mass m. The yoyo string is let out to length L, and is spun in a horizontal circle at a constant rate of ω. The yoyo string makes an angle of θ with the horizontal m = 39 grams = 0.039 kilgrams L = 46cm = 0.46m ω = 3 rads/sec...

Tension? knowing friction. I have the answer but need explanation :( Homework Statement A ring of mass 4 kg is attached to one end of a light string. The ring is threaded on a fixed horizontal rod and the string is pulled at an angle of 25◦ below the horizontal (see diagram). With a tension...

Homework Statement This is actually a sound wave problem, but I think I'll be fine when I actually get to that part; my issue is that it is a cumulative problem that involves torque, which I haven't had practice with since the fall. It's embarrassing how little I remember how to do from just a...

Homework Statement Hi, everyone. Me again. This time I'm here to ask about the tension in the string on a massive pulley. We have a wheel of radius R with a moment of inertia about its principal axis of 2/3 MR2 , suspended above the ground on frictionless bearings. A massless string of...

Homework Statement Attached the question. Homework Equations (total) tension = mg The Attempt at a Solution I'm not sure how the tension gets divided here. I know the tension on the right hand side of the turnbuckle is the same tension on the left hand side since they are...