Tension Definition and 1000 Threads

Homework Statement Homework Equations us*Fn = Fs FNET = ma Fk = us*Fn 3. The Attempt at a Solution A 0.42*9.8*4.4 = Fs Fs = 18.1104N B F = ma m = 18.1104N/9.8m/s/s m = 1.848kg 1.848kg-0.120kg = 1.728kg for the washers to make up for 1.728kg/(0.02kg/washer) = ~86 washers C I'm not sure...

Homework Statement Homework Equations I have no idea how to start this question, I looked at my notes from class and the textbook but just can't figure out how to start it! The Attempt at a Solution Any help would be greatly appreciated! Even if just to get started!Thanks Thomas

Homework Statement If you have a string being pulled on each end by 60N, what is the total tension in the string? Homework Equations N/A[/B] The Attempt at a Solution The answer in my textbook says 60N, but it doesn't make a whole lot of sense to me (even though it's obviously right). If...

Why is tension at a specific point in a string in 2 directions? For example in the first part of image 1, the string is pulling the two blocks upwards. And in the second part of image 1, the string is pulling the pulley down too. Does tension at a point in a string try to pull the point in 2...

Homework Statement Two masses: m1 = 45 kg, m2 = 12kg. m1 (45kg) sits at rest on a table top with static friction co. 0.45, kinetic friction co. 0.35. m2 is suspended in the air. m2 is attached to m1 by a massless wire hung over a frictionless pulley Homework Equations FBDs, net force...

Homework Statement A simple pendulum experiment is constructed from a point mass m attached to a pivot by a massless rod of length L in a constant gravitational field. The rod is released from an angle θ0 < π/2 at rest and the period of motion is found to be T0. Ignore air resistance and...

Let's say that block A is suspended vertically by a massless rope which you are holding and block B is suspended under block A by another massless rope. If I am drawing a free body diagram for block A, would the downward force be the weight of block B and Tension as well as an upward Tension...

Homework Statement Homework Equations Accelerating force = F Resultant force = ma The Attempt at a Solution D is the correct option. Tension in string = T REsultant force = F - T = ma T = F - ma or if there is no friction, is the accelerating force the resultant itself? How do I proceed...

Homework Statement For a stretched rubber band, it is observed experimentally that the tension f is proportional to the temperature T if the length L is held constant. Show that: a) The internal energy U is a function of temperature only b) Adiabatic stretching of the band results in an...

Homework Statement consider a horizontal cylindrical tube of cross sectional area A fitted with two frictionless pistons. The piston are connected to each other by an inextensible wire. Initially, the temperature of the gas is To and its pressure is Po which equals the atmospheric pressure...

Homework Statement Body of mass m is being pulled by a string so that it moves horizontally at constant speed. Friction coefficient between surface and body is u.Find an angle (alpha) between a string and horizontal surface for which tension in string is minimal and find that tension...

Hi, I'm having a problem with 3. (b) (ii) here. I know that the frictional torque is 1500Nm and that from (b)(i) being 5055N I assume this is multiplied by 1.5M (drum shaft radius) which gives me 7582.5N. Do I have to calculate the angular acceleration of the drum from here, which could then...

1. The problem statement, all variables and given/known data An elevator(4850kg) is to be designed so that the maximum acceleration is 0.068m/s2. What are the minumum and maximum forces the motor must exert on the supporting cable? 2. Homework Equations Force = mass(acceleration) Forcevertical...

Homework Statement One 3.2kg paint bucket(B) is hanging by a massless cord from another 3.2kg paint bucket(A), also hanging by a massless cord. a.) if the buckets are at rest, what is the tension in each cord? b.) if the two buckets are pulled upward with an acceleration of 1.6m/s2 by the...

I have a wire used for cutting cheese that gets pushed horizontally into the wire repeatably. Naturally the wires break as the wear. Currently, we just tighten the wire until it seems good but I am unsure how much the pretension in the wire influences the rate the wire breaks. I was looking to...

why is the tension force of spring conservative and tension force of rope not conservative ??

Homework Statement A 1.0 kg box on a horizontal frictionless surface is accelerated by attaching a 1.5 kg mass as shown in the diagram. What is the magnitude of acceleration of the box?(Remember, both boxes accelerate.) Homework Equations F = ma The Attempt at a Solution I drew a free body...

Homework Statement A crane lifts a 1250 kg load directly upward with a constant speed through a vertical distance of 8 m. How much work is done by the tension in the crane cable? Homework Equations Im thinking its the work equation but this is were i got stuck W = m(as)The Attempt at a...

Homework Statement if a vertical string hangs with mass M attached to its end and is twisted by angle (theta) then what will be the tension in the string 2. relevant equations T= mg torque= torsional constant x angular displacement 3. attempt to solution i am not able to start with...

I was looking at some tensile testing data of some round bars with grooves machined into them, and based on the geometry of the groove I could not figure out how it was possible to withstand the high loads that it was seeing. I was stumped, but by some blind luck I saw a property listed on...

[moderator's note: moved to homework forum so no template] In picture 3, A has touched the ground, so it has stopped. But B has a velocity upward. So in this situation, the cable is not straight. What will be the tension of the cable and what will be the accelertion of B in picture 3 ...

[moderator's note: moved to homework forum so no template] This is a frictionless ideal pulley. Are T_1, T_2, T_3 equal? If so, why? Please explain in details?

Homework Statement A uniform chain of length L and [constant] mass per unit length λ is suspended at one A end by an inextensible light string. The other end of the chain B is held at rest at level of end A of the chain. [See image.] Now if the end B of the chain is released under gravity...

what is the difference between the tension force of the rope and that of spring ??

Homework Statement A rope of mass m forming a circle is placed over a smooth round cone with half angle θ. Find the tension in the rope . Homework EquationsThe Attempt at a Solution Since the half angle is θ , the normal force N acts at an angle θ with the horizontal . The weight acts...

Homework Statement Imagine one of those amusement park rides where you have a large rotating disc with seats hung by chains around it. As the disc spins, the seats also spin whilst rising up as well. The question asks for all answers to be written given the constants L, the length of the chain...

Homework Statement An Atwood machine consists of two masses, M and m, which are connected by an inelastic cord of negligible mass that passes over a pulley. If the pulley has radius R and moment of inertia I about its axle, determine the acceleration of the masses M and m. Homework Equations...

Blocks 1 and 2 of masses ml and m2, respectively, are connected by a light string, as shown above. These blocks are further connected to a block of mass M by another light string that passes over a pulley of negligible mass and friction. Blocks l and 2 move with a constant velocity v down the...

Homework Statement http://ocw.mit.edu/courses/mechanical-engineering/2-06-fluid-dynamics-spring-2013/assignments/MIT2_06S13_ps2.pdf Problem 7[/B]Homework Equations ##F=2*V/(a^2)*\sigma*cos(180-\theta)## The Attempt at a Solution With the problem statement given, it seems like the component of...

Homework Statement A chain of mass ##M## and length ##L## held vertically by fixing its upper end to a rigid support. The tension in the chain at a distance ##y## from the rigid support is Homework Equations ##F=ma## (Newton's 2nd law) The Attempt at a Solution Since net acceleration...

Homework Statement A 1200 kg steel beam is supported by two ropes. Rope one is 20 degrees off of the vertical, and rope two is 30 degrees off of the vertical. What is the tension on rope two? (Answer should look like '2300 N'.) Homework Equations F=ma The weight of the mass is defined as the...

Homework Statement A cart loaded with books has a total mass of 20kg and is pulled at a constant speed by a rope inclined at 30 degrees above the horizontal. The cart moves a distance of 10m on a horizontal surface. The coefficient of kinetic friction between the cart and the surface is 0.45...

Three blocks are connected as shown in the uploaded picture. The strings and friction-less pulleys have negligible masses, and the coefficient of kinetic friction between the 2.0 kg block and the table is 0.17. What is the acceleration of the 2.0 kg block? Homework Equations ∑F = ma The...

If I have a U-shape wire frame and it contains a straight sliding wire and I dip this in soap, a film forms between the sliding wire and the boundary of U shape frame. Why is the force due to surface tension F = 2Tl where l is length of sliding wire? They say there are 2 layers in contact...

Homework Statement See image attached Homework EquationsThe Attempt at a Solution bii) Tc=mc(a+g) Need help on Ci what I did is (9x9.81) -uR-6g=10a Have no idea what to do though really

Problem: A 22.0-kg crate is pulled along a horizontal floor by the ideal arrangement shown in figure below. The force F is 300 N. The coefficient of friction between the crate and the floor is 0.270. What is the acceleration of the crate? Homework Equations F = ma Friction =...

I suspect my question will be somewhat unique, please forgive me if it's entirely out of place. (Please also forgive my ignorance when it shows, my knowledge of physics is extremely limited.) You might wonder why I'm asking it here, rather than on a guitar forum. Let me simply say that the...

if one string can hold a block of 100kg, how much weight can two strings connecting the ceiling and one single point hold a block?? is it 200 kg? if yes, then what about one string connecting the ceiling and one single point of the block two times, three times or more? [im sorry if the grammar...

The string on the violin with the highest pitch is the note E, which has a frequency of 329.6 Hz and a wavelength of 1.032 m. If the string has a mass of 180.0 g and a length of 32.0 cm and is currently producing a wave of frequency 328.1 Hz, how much do you need to change the tension in the...

Homework Statement A stuntman whose mass is 70 kg swings from the end of a 4.0-m-long rope along the arc of a vertical circle. Assuming he starts from rest when the rope is horizontal, find the tensions on the rope that are required to make him follow his circular path at a height of 1.5 m...

I measure the tension in a pulley system with two masses (one smaller, one larger) where I pull the small mass down and let it go so that the system accelerates in the direction of the larger mass. This is without friction. Then, I try to consider friction. Does the tension in the string...

Homework Statement A rope of mass ##m## forming a circle is placed over a smooth round cone with half angle ##\theta##. Find the tension in the rope. Homework Equations ##\sum{F}=0## The Attempt at a Solution I know how to solve the problem, but I have another way that I think should work but...

If you increase the surface tension of a liquid, does it change the average bond strength of the liquid?

Homework Statement What is the tension in the strap which the boy uses to hold onto the pack? Mass of Boy=45kg Mass of Pack=25kg θ=42° Coefficient of kinetic friction between boy and incline=0.35 Coefficient of kinetic friction between pack and incline=0.48 Acceleration of boy=4m/s^2...

What's the difference between surface tension and capillary force? Surface tension, a tensor, is the force per unit length. Again surface energy is the energy required to increase the surface area by one unit. Is the surface tension a capillary force?

Homework Statement This figure shows a uniform disk, with mass M = 2.5 kg and radius R = 20 cm, mounted on a fixed horizontal axle. A block with mass m = 1.2 kg hangs from a massless cord that is wrapped around the rim of the disk. Sample problem 10-8 (has picture diagram and detailed...

Two strings are adjusted to vibrate at 260 Hz. One string is tightened then 3 beats per second is head when the string vibrate at the same time. What is the new frequency of the tightened string. I am using Fbeat=F1-F2; so wouldn't the answer just be 263 Hz

1. Find the tension in each cord if the weight of the suspended object is w. (I am only asking about part a) 2. Net force on an object in equilibrium = 0 3. part a) I know this isn't the typical solution for this type of problem but I don't understand why it's not working. I used the...

Homework Statement A 3kg block is connected to a 5kg block by a rope. A second rope is attached to the 5kg block and is being pulled by someone with a force of 11N. What is the tension on the rope between the two blocks? No friction Homework Equations F=ma[/B]The Attempt at a Solution So I...

Homework Statement Three pictures of equal weight (20 N) are hung by wires in three different orientations. In which orientation are the wires least likely to break? Orientation A: 15 degree with horizontal,Orientation B: 45 degree angle with horizontal, Orientation C: 60 angle with horizontal...