Tension Definition and 1000 Threads

Hi I want to study the topic of surface tension for the purpose of solving problems. I have textbooks like Halliday Resnick and Young Freedman. But these books don't cover the topic of surface tension. If you know any free, open resources to study this topic, please let me know thanks

Homework Statement A long rope with mass m = 10 kg is suspended from the ceiling and hangs vertically. A wave pulse is produced at the lower end of the rope and the pulse travels up the rope. (a) Explain why the speed of the wave pulse change as it moves up the rope; does it increase or...

Homework Statement A ball of mass m is attached to a rope of length L which has one end at the origin; the ball moves in a horizontal circle at constant speed v0 on a frictionless plane; the velocity is always at 90◦ to the rope. The ball has a charge q, and moves in a constant magnetic field...

Homework Statement [/B] Water rises in a capillary tube to certain height such that the upward surface due to surface tension is balanced by 7.5 X 10-4N Force due to weight of the liquid. If the surface tension of water is 6 X 10-2Nm-1,the inner circumference of the capillary must be Homework...

Homework Statement [/B] The question is from chapter 9 of "Exercises in Introductory Physics" by Leighton and Vogt. The answer given in the book is ##R = 4.9 \times 10^{-5} \rm{cm}##. Homework Equations $$\sigma = \frac{\Delta P \cdot R}{4}$$ Where, ##\sigma## is the surface tension...

Homework Statement 2 & 3. The Attempt at a Solution I've worked out: The total force on the gate. I have worked out the centre of pressure which I got a value of 10/3m (from the hinge). For the moment about the hinge I got a value of 981,000Nm using the equation M=FN*X where X is the centre...

Hi, this is my first forum post - sorry if I'm in the wrong place, or I've done something wrong! Homework Statement Here goes: There is a beam of 0.5m length hinged to a wall at a right angle with 200N mass at the end of the beam. This is supported by a wire T at angle 30°. The question asks...

Homework Statement A tugboat pulls two barges down the river. The barge connected to the tugboat, carrying coal, has an inertia of 2.0 × 105 kg, and the other barge, carrying pig iron, has an inertia of 3.1 × 105 kg.The resistive force between the coal barge and the water is 8.0 × 103 N, and...

Homework Statement A rod of length L = 20 m and mass m = 50 kg juts out perpendicular to a wall. The rod is designed to pivot vertically about the point where it intersects the wall. A massless pulley is affixed to the wall a height h = 10 m above the rod. A cable is attached to the rod a...

Homework Statement A locomotive has a mass of 40 tonnes. In one situation, the locomotive is pulling two trucks, each of mass 10 tonnes Calculate the tension in the coupling pulling the two trucks behind the locomotive. The coupling is positioned such that it is linking the locomotive and the...

Homework Statement A load of 1150 kg is suspended as shown in the figure. The angle θ1 = 57° and the angle θ2 = 36°. (a) Calculate the tension in all three wires (that is, the magnitude of the tension force exerted by each of these wires): Tension in left wire Tension in right wire Tension in...

Homework Statement A ball of mass 620 g hangs from a spring whose stiffness is 115 Newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is stretched, and its...

Homework Statement A rope attached to a 19.0 kg wood sled pulls the sled up a 19.0° snow-covered hill. A 14.0 kg wood box rides on top of the sled. EDIT: the actual question to be answered, oops. What's the magnitude of the tension that will cause the box to slide? Mass of box (mb) = 14.0kg...

a light inextensible string passes over a fixed pulley A, under a movable pulley B of mass M and then over a second fixed pulley C. A mass m is attached to one end of the string and a mass 3m is attached to the other end. the system is released from rest. (i) prove that the tension t in the...

Homework Statement Why is the tension always tangent to the portion of the cable? The correct situation is on points A and B. Why can't be like on C and D? Homework Equations Newton's force-mass: ##F=ma## The Attempt at a Solution If i move the portion of the cable and examine, for...

Homework Statement A hockey puck with mass 200 g is attached to a rope of length 62.0 cm and swung in a horizontal circle against the ice at a rate of 58.0 rpm. Assuming the ice is frictionless, what is the tension in the rope? Homework Equations FT = mω2r The Attempt at a Solution 58rpm =...

Homework Statement A 7kg mass is hung from a 1.5 m long massless string. It is released from rest with the string displaced by an angle of 18 degrees from vertical. a) Make a free body diagram of the forces on the mass just after it is released. b) Find the tension in the string. c) Find the...

Homework Statement Two balls with masses m1=0.3 kg and m2=0.7 kg are connected by massless strings with lengths L1=0.2 m and L2=0.26 m, as shown. The arrangement of strings and masses rotates at constant angular frequency ω=57.6 radians/s around a fixed pivot point. Find the two tensions...

Homework Statement A small ball with mass m=1.1kg moves on the end of a string with length L=2.9. The string is anchored at point A and travels in a horizontal circle as shown. The string is at and angle of 36 degrees from the vertical. What is the string tension as the ball swings in this...

Homework Statement An unbalanced pulley 8in. radio. and 32.3 pounds weighing. It has a radius of gyration of 6in with respect to its axis. When a pair M = 100pie.lb applies, lifts a weight W = 96.6 pounds. In the position shown in the figure, the pulley has an angular velocity of 3 rad / sec...

Homework Statement Homework Equations Conservative of energy mg(y2-y1) +1/2 k (s2-s02) = 1/2 mv12 +1/2 mv22 The Attempt at a Solution v1 = 0 at rest y2 = 0 bottom What I got is v2 = 8.20 m/s but not correct, I don't know how I can take into account the tension.. Fspring = -ks = -4000 N/m *...

Homework Statement A weightless string passes through a slit over a pulley. The slit offers frictional force '##f##' to the string. the string carries two weights having masses ##m_1## and ##m_2## where ##m_2 \gt m_1##, then find the acceleration of the weights. Homework Equations...

Homework Statement You're attached to a space station moving at 25000 km/h at a distance of 500 km above Earth by a rope connected to a jetpack(force 3N). Your mass is 60kg. Using the jetpack you move to the maximum extension of the rope (6m) and activate the jetpack for 3s perpendicular to the...

I am trying to derive an expression for the Tension T in the massless bar in the given photo. Where there is a cart that is moving only in the x-direction and the bar is rotating around a point pivoted at the cart with angle theta. The expression that I have is deduced from: ∑ F (towards...

Homework Statement http://postimg.org/image/ys43ylstp/ [/B] I need to find tension and current in each element of the circuit. I have included an image of what I have drawn so far for the circuit. http://postimg.org/image/ys43ylstp/ Homework Equations Kirchoff's laws. The Attempt at a Solution...

I was having a lot of trouble understanding tension force in a string. So i decided to write a sort of essay on it. Here it is: Tension/Tension Force 1.Tension/Tension force is the electromagnetic internal force transmitted through a rope, string, cable or a wire, when pulled taut by external...

Homework Statement An object of mass 0.8kg is whirled round in a horizontal circle of radius 2m with a constant speed of 15ms-1. Calculate the tension in the string. The Attempt at a Solution So far I have calculated that the angular velocity is 7.5rads-1, the frequency is 1.19Hz and the time...

Homework Statement A muscle exerciser consists of two steel ropes attached to the end of a strong spring contained in a telescopic tube. When the ropes are pulled sideways in opposite directions, the spring is compressed. The spring has an uncompressed length of 0.80 m. The force F (in N)...

Homework Statement A uniform rope of mass ##M## and length ##L## is pivoted at one end and whirls with uniform angular velocity ##\omega##. What is the tension in the rope at distance ##r## from the pivot? Neglect gravity. Homework Equations $$\vec{F}=m\vec{a}$$ The Attempt at a Solution...

Hello guys, Can someone guide me through this problems solution? I need to find the Thevenin's Equivallent for this circuit, between A and B. I'm terrible at Circuits and I'm eager for some motivation and help. Thanks a lot in advance.

Consider an example of a mass hanging by a string. The string is fixed at the other end. The mass will be at rest because weight of the object is balanced by tension in the string upwards.Consider another example in which the other end of the string is not fixed. Now if that object is coming...

Homework Statement See attached picture. Homework Equations Change in work = force x distance moved The Attempt at a Solution So I took the ratio AC/AB = 1/ $\sqrt{2} $ which I set equal to T/50 where T is the tension we want to find. Solving this gave me T=50/ $\sqrt{2} $. I just wanted to...

Homework Statement An object at rest is suspended from two strings (A and B) as shown in the diagram, with A shorter than B. The object pulls on the point O with a force of 20 N. Each of the strings also exerts a force on the Point O. The angle between the strings at O is 90o. Which of the...

Homework Statement Consider the systems of 2kg and 5kg blocks. The 2kg block is resting upon a smooth frictionless horizontal surface and friction in pulley bearing is negligible. The 5kg block is suspended by a cord connected to the 2kg block. Determine the acceleration of system and tension...

Homework Statement A solid cylinder is attached by a rope on its center.It has mass of 5kg and is lying on a table.The other end of the rope is a block of mass m2 which is not on the table .if the coeficient of friction between cylinder and table is 0.2.Find the maximum mass 2 so that the...

I am struggling to understand the relation between surface tension and surfactants. When surfactants are added to say water they may have charge and head groups which influence surface motion due to repulsion and their size. However often when people refer to surface tension they refer to a...

Homework Statement Two cyllinders of equal size and of mass M (one hollow, one solid) are connected along their common axis by a light rod and placed on an inclined plane with an incline of α (both cylinders are on the same height initially). The system of cylinders then begins to roll down...

Homework Statement Find the relation between the mass of block 1 and the mass of block 2. Assume that the pullies are massless and frictionless and that the rope is inelastic. All masses are unknown. Possible answers: mblock2 = mblock1[/B] mblock2 > mblock1...

Homework Statement A rope has an end fixed and the other is passing through a pulley and has a body attached to it. The fondamental frequency of the rope is initially ##f_1=400 Hz##. If the body is then put in water the fondamental frequency of the rope becomes ##f_2=345 Hz##. If the linear...

Homework Statement Refer to figure. Homework Equations U=Fs T=.5mv^2 Vg=mgh The Attempt at a Solution I am not exactly sure where to start. I would appreciate if someone could nudge me in the right direction and then go from there.

Ok guys, i just don't seem to know anything about tension, i thought that it would always equal the weight that is suspended from the rope...But that does not seem to be the case...and also i don't get the issue of its direction. Anyways, suppose we have an atwood machine and two unequal masses...

Equations: Net torque=0=Net force I believe this is a static equilibrium question but can't figure out how to do it

Homework Statement In my notes , I was told that shear stress is maximum at the neutral axis . The normal stress will be maximum at one end , while the another end will be minimum... Homework EquationsThe Attempt at a Solution Why the shear stress is maximum at the neutral axis ? When we...

Homework Statement I have the bent beam like this . The inner part of beam undergo compression , right , so it shortens. Why the stress is minimum at here ? the outer part undergo tension , why the normal stress is maximum here ? This is from my notes http://imgur.com/a/H8fy4 Homework...

Hi, What element should I use to model a tension-only (no bending stiffness) cable/chordae? The problem is that I need to use a hyperelastic material model with it. And LINK180 does not support the hyperelastic material model. Thanks!

Homework Statement A sinusoidal wave on a rope with linear density ##\mu=0.012 kg/m## is described in SI units by $$\xi(x,t)=A sin (kx-\omega t)= 0.15sin(0.8x-50t)$$ a) find the maximum acceleration of a rope element b) find the maximum transverse force on a piece of rope ##1 cm## long c) Show...

Homework Statement Two blocks are connected by a massless string that passes over a frictionless pulley. The coefficient of static friction between m1 and the table is 0.45. The coefficient of kinetic friction is 0.35. Mass m1 is 45kg and mass m2 is 12kg. Determine tension in the string. ***I...

Homework Statement An initially stationary box of sand is to be pulled across a floor by means of a cable in which the tension should not exceed 1100 N. The coefficient of static friction between the box and the floor is 0.35. (a) What should be the angle between the cable and the horizontal in...

Homework Statement You have a ukulele and you change the strings tension so that it becomes tighter. First the frequency was 431 Hz and after we tightened the string the frequency. how much bigger does the force have t be to get that frequency? Homework Equations PA*V^2 = F (P = density, A =...

Homework Statement "A solid uniform 45-kg ball of diameter 32cm is supported against a verticle frictionless wall using a thin 30cm wire of negligible mass. A)Make a free body diagram for the ball and use it to find the tension in the wire. B)How hard does the ball push against the...