Tension Definition and 1000 Threads

Does the tension force in elastic springs and strings arise inevitably as a consequence of Newton's third law? Or is it due to the electrostatic forces within the material itself? Or are both of these explanations basically the same thing?

Homework Statement problem attached Homework Equations The Attempt at a Solution well, there is pretty much nothing i can write here, i couldn't solve it because this is the first time i face a problem like that , i have some problems understanding it though 1-if we considered the...

Suppose the rope involved in the pulley is massless and experience no friction. Why is the force on the right hand side equal to the tension experienced by the rope on the left hand side?

In a V-Belt Drive, it is said that when a New Belt is installed, the Tension Ratio shouldn't exceed 5:1. But isn't this ratio beyond control and is defined by T1/T2 = μ*α*cosecβ where T1/T2=Tension Ratio, μ=Coefficient of Friction, α=Angle of Wrap, β=Groove Angle of V-Belt. All of these variable...

Hey guys, I'm looking for examples of real life systems which uses a board with holes to redirect cables in tension (as opposed to pulleys) for some inspiration on a project I'm working on. I've attached an schematic of what I mean. I've tried searching google for systems but it's a hard...

Homework Statement A ball of mass 125g is attached to a string .900 meters long. It is then set into vertical circular motion with 38 RPM. What is the tension of the string at the top of the circle and at the bottom of the circle? Homework Equations ∑Fy = may = marad arad = v2/R =...

Homework Statement Two masses hang by a pulley system shown in the attachment. The masses both weigh the same. Find the tension on the rope. The first attachment is straight from the book, the second attachment is me redrawing it with labels along with a free body diagram of each mass...

Homework Statement A 23.0 kg child plays on a swing having support ropes that are 2.10 m long. A friend pulls her back until the ropes are 41.0-degrees from the vertical and releases her from rest. a.)What is the potential energy for the child just as she is released compared with the...

Homework Statement Q .Find the tensions in the strings (1), (2) and (3) and the acceleration of the mass ‘m’ just after : (a) string (1) is cut (b) string (2) is cut (c) string (3) is cutHomework Equations The Attempt at a Solution I feel the answer should be (a) T1 = 0 ; T2...

1. Finding tension force and torque (details attached) http://imgur.com/cZLG9xP 2. please see attachment http://imgur.com/cZLG9xP 3. For part 1). I get ​{​T} = -\sin \alpha(i) +\cos \alpha(j) is this correct? (Where T is the tension force) For part 2). I am...

Homework Statement The slop has friction. Variables: m1=4kg , m2=2kg, m3=8kg μ (coefficient) = 0.1 α=30° 1. What is the acceleration of the system? 2. Calculate the tension of the rope between m1 to m2 and between m2 to m3. Homework Equations Newton's second law and free...

Hi, my problem is this; I am designing a cable camera system to film downhill pursuits. I need to calculate how much tension is required to hang a cable over a 100m span with no more that 0.5m sag in the middle, when is it fixed at two point, both at the same hight. From the research I have done...

Homework Statement Two masses M of the same amount are tied to two stings of length L and 2L. If both masses are swung in unison faster and faster, which string will break first? Homework Equations The formula I've been using is Tension = mv^2/r. The Attempt at a Solution My...

Homework Statement A long string is constructed by joining the ends of two shorter strings. The tension in the strings is the same but string I has 4 times the linear mass density of string II. When a sinusoidal wave passes from string I to string II: A. the frequency decreases by a...

when we try to measure surface tension of different concentrated solutions of n-butanol with a tensiometer, we have to go from lower to higher concentration and not the other way around. what is the reason for that?

A massless rod of length L attached to mass m and with axle to cart of mass M. The cart has a shape of equilateral triangle (edge L). the cart is at rest and its center of mass is above x=0 and a rod is perpendicular to the ground. the cart is free to move without friction. at time t=0 the mass...

Hi, I'm a bit confused. Say you're bending a cylindrical pipe (tube, hollow cylinder). So the neutral axis of the pipe will be in the middle of the pipe and all the material on the inside of the bend (to one side of the neutral axis) will be in compression, while all the material on the...

Q: You are pulling your younger sister along in a small wheeled cart. You weigh 65.0 kg and the combined mass of your sister and the cart is 35.0 kg. You are pulling the cart via a short rope which you pull horizontally. You hold one end of the rope and your sister holds the other end. If you...

Homework Statement What is the tension of the string? Mass of piano string- 3.5g Lenght of piano string- 75cm Fundamental frecuency- 469Hz Homework Equations λ=2L/n ? Dont know where to start.

Unfortunately there's no link to the test. This is from the test administered a month ago. Homework Statement A choppah is flying horizontally at constant speed. A perfectly flexible uniform cable is suspended beneath the choppah; air friction on the cable is NOT negligible. Which of...

Can someone please tell me how my teacher got Acceleration of 1.44m/s^2? I don't see how its even possible without another force acting on the object

I attatch a rope of a constant density to the Moon and fasten it down to the surface. I set the other end in space right above Earth's atmosphere. The angular speed of the entire rope is brought up to the same angular speed as the Moon at time=0. http://i.imgur.com/kHlVvnM.png What would...

Homework Statement A particle P of mass m is suspended from two strings AP and BP where A and B are attached to 2 points on a horizontal ceiling distance 5l/4 apart as shown in the figure. AP is inelastic and of length l. The modulus of elasticity of BP is λ. Show that the natural length L...

Why is one Tension Negative and the Other Positive -- Atwood Machines Hello, Please consider the following: I am trying to understand how to solve for acceleration when dealing with Atwood machines. I keep getting hung up on one part: the direction of tension. In the image above, why is...

Homework Statement Due to friction, a force of 400 N is required to pull a wooden box on the floor. The cord used to pull the box makes an angle of 56° horizontally. How much tension should be on the cord to be able to pull the box? Homework Equations W = Fd * (cosθ) Tension =...

Homework Statement A 50 kg woman dangles a 50 kg mass from the end of a rope. If she stands on a frictionless surface and hangs the mass over a cliff with a pulley as shown, the tension in the rope will be... Homework Equations F = m*a The Attempt at a Solution (no calculator...

Homework Statement Two bubbles, one of radius R and the other of radius 3R come into contact with each other. What is the distance between the centres of the two bubbles? Ignore the weight of the bubbles. Homework Equations p(inside bubble)= p(atm) + 4T/R where T is the surface tension and R...

Homework Statement Please see the picture. Homework Equations How do they get this derivation? The Attempt at a Solution I know that lambda = 2L/n and f = nV/2L so I can somewhat rearrange it myself, but I do not know where the square root is coming from.

Homework Statement The thin steel plate, weighing 82lb/ft^2, is being lifted slowly by the cables AC and BC. Compute the distance x and find the corresponding tension in each of the cables. [See attachments for Figure] Homework Equations Summation of X = 0 Summation of Y = 0 Moment=Rd...

Homework Statement The maximum tension the string can have without breaking is Tmax. Derive an expression for Vmax, the maximum speed the ball can have at point Q without breaking the string. Homework Equations F=ma Vc=(mv^2)/r T=mg+ma The Attempt at a Solution I thought I could do...

Hi. I am doing a physics project and we have been told by my lecturer to find out how to determine the surface tension of a liquid using Poiseulle's Law and to describe an experiment on how to do so. I have no idea how you could do this because none of the variables in the law relate to surface...

Hello, I am looking for a general formula for the surface tension dependence with respect to temperature. I am aware of the Eötvös rule (http://en.wikipedia.org/wiki/E%C3%B6tv%C3%B6s_rule), but I only found data for water, and wonder if there are some for other compounds. Also, I wonder...

Homework Statement "Block A has mass ma=4.0kg, and block B has mass mb=2.0kg. The coefficient of kinetic friction between block B and the horizontal plane is μk=0.50. The inclined plane is frictionless and at angle θ=30°. The pulley serves only to change the direction of the cord connecting...

Homework Statement A cable is being used to lift a 350 kg piano into a helicopter. The cable can exert a maximum force of 5000 N without breaking. What is the maximum acceleration that the cable can give to the piano? Homework Equations w=mg The Attempt at a Solution w=? a=...

My question is how do you find the acceleration if you don't know the Tension. If someone could just elaborate on the question as a whole it would be very helpful. I didn't really know anything about how to do this problem.

My apologies for asking two questions in a short period of time, this is the last question I have. Hopefully one day I'll be skilled enough to answer everyone elses! :) Homework Statement An empty elevator has a mass of 722 kg. It moves between floors at a maximum speed of 6.00 m/s. The...

This was from my last exam. I got this problem wrong. I feel like I should have known how to do it but I blanked out or something. Just coming here to figure out how it's supposed to be done. (This is from what I remember, numbers may be off from what was on the test) I know I got it wrong...

I am studying surface tension and I am summing up what I have learned through books till now: → On a molecular level, due to unbalanced forces on the uppermost level, the liquid molecules tend to go down the liquid. → As the molecules go down, the uppermost layer shrinks in size and tries...

Tension -- how is mechanical tension even defined? Hello, I'm currently a student in AP Physics having a little trouble with the concept of tension, especially that of a pulley system or an Atwood machine. First, how is tension even defined? Is it the reaction force to the applied force on...

1. The uniform beam shown in figure 5-15 weighs 500 N and supports a 700 N load. Find the tension in tie rope and the force of the hinge of the beam. The answer according to the book must be 2.9 kN as the tension in tie rope and 2.0 kN as the force of the hinge of the beam. 2. The arm...

Homework Statement A 0.70-kg disk with a rotational inertia given by MR^2/2 is free to rotate on a fixed horizontal axis suspended from the ceiling. A string is wrapped around the disk and a 2.0-kg mass hangs from the free end. If the string does not slip, then as the mass falls and the...

Homework Statement My boat is tethered to a rope that can withstand a maximum of 8000 pounds of tension. The wind will exert, at maximum, 3000 pounds of force on the boat. How do I calculate the tension on the rope based on the angles that the rope is at? does it make a difference if the...

My boat is tethered to a rope that can withstand a maximum of 8000 pounds of tension. The wind will exert, at maximum, 3000 pounds of force on the boat. How do I calculate the tension on the rope based on the angles that the rope is at? does it make a difference if the boat is stationary, or if...

Can someone explain this please?? Weird pulley with Tension Homework Statement See attached picture for problem Homework Equations n/a The Attempt at a Solution The answer is B. No idea why. Any help would be appreciated. Thanks!

Homework Statement A capillary tube of radius r = 0.3mm is filled with water. A water droplet is hanging on the bottom of the tube, as shown in the picture. The water level is h = 5.2cm. Estimate the radius of curvature of the droplet R. The coefficient of surface tension of water is σ =...

How is the tension equal in both sides of the string, if the string is over a pulley with two different masses attached to its sides?

Homework Statement a 8kg ball is hanging from a 1.35m string. A 2 kg ball moving horizontally at 5m/s hits the hanging 8kg ball in an elastic collision. What is the tension in the string just after the collision? Homework Equations The Attempt at a Solution Initially there is only...

Homework Statement A 5 kg mass is attached to two ropes as indicated in the figure below. Find the tension in both ropes. Homework Equations Ʃy= 0 Ʃx = 0 The Attempt at a Solution Mass of object: 5 * 9.81 = 49.05 T1 sin 30 - T2 cos 20 = 49.05 T1 cos 30 + T2 sin 20 = 0...

Tension and Pulleys...Cannot understand this problem So this is NOT for homework, (I'm doing practice problems reviewing for a final), but this is a textbook question that might as well be homework. This is the question: Figure 5-53 shows a man sitting in a bosun’s chair that dangles...

Homework Statement Determine whether each joint is in tension or compression (correct answers on the image) Homework Equations sum of force = 0 The Attempt at a Solution On Joint I, I don't understand why IH is in tension. The pin is exerting a horizontal force and...