Tension Definition and 1000 Threads

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...

Homework Statement The diagram shows a block and pulley system where all the surfaces are frictionless, and all the pulleys are massless and frictionless. Express the magnitude of the acceleration of Block 2, a2, in terms of a1 and/or a3. Homework Equations F=ma The...

Homework Statement The diagram shows a block and pulley system where all the surfaces are frictionless, and all the pulleys are massless and frictionless. Once all Blocks have been let go, what is the ratio of the magnitude of the acceleration, a1, of block 1 to the magnitude of...

Homework Statement A small square truss shown is supported by a pin joint at I and a roller at A. Label all members of the truss by Z (for zero force member), C (for compression) or T (for tension). Homework Equations The Attempt at a Solution So this was an exam question...

Homework Statement The block moves at 2.3 m/s to the left (on a flat, horizontal surface). If μk, the coefficient of friction between the block and the floor, is .40, what is the tension in the rope? Also, the weight of the block is 9.8 NHomework Equations No equations were given... but I used...

Homework Statement A crane in a marble quarry is mounted on the rock walls of the quarry and is supporting a 2000 kg slab of marble as shown in the figure. The center of mass of the 900 kg boom is located one-third of the way from the pivot end of its 15-m length, as shown. Given...

Homework Statement http://i1345.photobucket.com/albums/p679/Duk_Bato/Untitled_zps84f60bfd.png Homework Equations ƩMA = Ʃ r x F The Attempt at a Solution 1.6 * T+ 0.8 * sin 40 *T = 1.2 * 250 T (1.6 + 0.8 * sin 40 ) = 300 T = 300 / ( 1.6 + 0.8 * sin 40 ) T = 141.9 N RX=...

Homework Statement a 0.60 kg sphere rotates around a vertical shaft supported by 2 strings, as shown. if the tension in upper string is 18N calculate. a) tension in lower string? b) rotation rate (in rev/min) of the system. Homework Equations The Attempt at a Solution...

Hello, if I were to suspend a rubber stopper into a graduated cylinder filled with water, with the stopper half in the h2o and half out of it, how would i calculate the tension in the string? Experimentally, i would collect the displaced volume, density (1000kg/m3), and mass of stopper. I am...

Recently stumbled on this problem: A uniform disk (I =½ MR2 ) of mass 8.0 kg can rotate without friction on a fixed axis. A string is wrapped around its circumference and is attached to a 6.0 kg mass. The string does not slip. What is the tension in the cord while the mass is...

1. Homework Statement [/b] A stone mass 284g is twirled at a constant speed 12.4m/s in a vertical circle of radius 0.850m. Find the tension in the string at the top and at the bottom of the revolution. What is the maximum speed the stone can have if the string will break when the tension...

Homework Statement A rigid weightless horizontal beam is hinged at a wall and is supported by two rods. The beam has a 8000 pound load applied at the end. Calculate the tension in each rod. The left rod is made of brass and has diameter of 1.25" and the right rod is made of aluminum and has a...

If the gymnast has a mass, m = 36.7 kg, and the angle θ = 4.0°, calculate the tension in the rope from which she is hanging. ƩFx = T1x - T2x = 0 Then T1cos4 = T2cos4 T1 = T2 = T ƩFy = 2Ty - mg 2Tsin4 = mg T = mg/2sin4 = 2578 N I have gotten the solution. I am just confused at...

Sometimes when I see pulley and rope questions people will say "for a non-extensible rope the tension is uniform throughout the rope". But I am now learning pulleys and rotational inertia and it seems to be necessary to consider the rope on either side of a pulley to have _different_ tension if...

Homework Statement A 1.3kg stone is whirled in a vertical circle at the end of a 0.83m long string. The tension in the string at the top of the circle is 6.4N. What is the tension in the string when the stone is at the bottom of the circle? Homework Equations Fc= mac W=|F||Δd|cosθ...

Two buckets of sand hand from opposite ends of a rope that passes over an ideal pulley. One bucket is full and weighs 118 N; the other is only partly filled and weighs 58 N. After the buckets are released and allowed to move what is the tension in the rope I drew a force diagram but all I...

Illinois Jones is being pulled from a snake pit with a rope that breaks if the tension in it exceeds 725 N. If Illinois Jones has a mass of 62 kg and the snake pit is 3.9 m deep, what is the minimum time necessary to pull our intrepid explorer from the pit? F=ma and a=d/t^2 I put...

Homework Statement A 1000N beam is loaded with a 2000N filing cabinet and supported by two cables. If the beam is 8 meters long and the filing cabinet is 2 meters from the left cable, what is the tension force in each cable? Homework Equations T= F /d The Attempt at a Solution For...

Homework Statement Homework Equations The Attempt at a Solution For this problem, what I am confused about is the fact that the Z direction parts of the tension will tend to rotate in a direction different from the Y components of the tension and the 850 lb vertical force. I am not sure how to...

Homework Statement I need to generate a field of B = 10 T at the center of a magnetic loop (coil). The coil should have r = 70 m. The coil material itself should be a cable of r = 0.2 m. The question, how much mechanical stress is applied throughout the loop? I'm trying to figure out, if such...

here is how the problem looks. http://i39.tinypic.com/2d0j4wg.png a pullstring walker is in the middle of a string that is connected to two mountain sides. the string formes an angle of 10 degrees under the horizontal. the walker has a mass of 50 KG. find the tension of the string any...

Homework Statement Two chests are connected by a 15 meters long rope attached to a ceiling hook hanging 4 meters high. The chest (1) at 5 meters from the hook has a velocity of 1/2 m/s away from the other chest (2). The chests remain flat on the ground and the rope is under tension. What is the...

For this problem, my thinking was that since the top of the rod is fixed, then the only part that is elongating is the bottom, so I found the part elongating at AB and said that was the total elongation. I am not sure if this reasoning is sound. I suppose the other possibility would be to add up...

Homework Statement Just started tension problems and having some trouble figuring out how to approach the problem. Thanks for any help in advance. Consider a rocket that is taking off and towing a large container of trash. The rocket’s engines exert a force, F, that causes the rocket and...

Homework Statement m_2>m_1 The pulley rotates. Find the tensions, T_1, T_2, T_3 Homework Equations Newton's laws The Attempt at a Solution I know how to solve the problem if the pulley doesn't rotate because the systems would be in equilibrium (Newton's first law) and dividing...

Homework Statement A 2.00kg aluminium block and a 6.00kg copper block are connected by a light string over a frictionless pulley. They sit on a steel surface, which is fixed, as shown in the figure, with a (let it be alpha lol) = 43.0deg. The coefficient of static friction for aluminum on steel...

Homework Statement A circular conducting coil is present in space in the absence of any external electric and magnetic fields.A steady and constant current is flowing through the coil.What is the tension developed in the coil?.(Given current is 'I' and radius of coil is 'r') Homework...

Homework Statement A student pulls her 22-kg suitcase through the airport at constant velocity. The pull strap makes an angle of 50 degrees above the horizontal. (a) If the frictional force between suitcase and floor is 75N, what force is the student exerting? (b)What's the coefficient of...

Homework Statement Cliff and Will are carrying a uniform 2.0m board of mass 77kg. Will is supporting the board at the end while cliff is 0.6m from the other end as shown in the following figure. Cliff has attached his lunch to his end of the board, and the tension in the string supporting...

A chandelier with mass m is attached to the ceiling of a large concert hall by two cables. Because the ceiling is covered with intricate architectural decorations (not indicated in the figure, which uses a humbler depiction), the workers who hung the chandelier couldn't attach the cables to the...

Homework Statement On her flight home at Thanksgiving, Margaret decides to apply the physics she has learned in PHYC1300 to measure the speed of the aircraft when it takes off. She dangles her watch from a string while the aircraft accelerates down the runway. Draw a free body diagram of the...

Homework Statement A bored but observant child on a moving train ties a ball to one end of a string and ties the other end to a light fixture on the ceiling of the train. When the train slows down, the child notices that the string is no longer hanging straight down but instead makes an angle...

Homework Statement A bowling ball is suspended from a ceiling hook using a thin piece of rope. The rope is exerting a 75 N force upward on the ball. Suppose that the rope is unhooked from the ceiling and pulled upward so that the bowling ball rises 1.2 meters in 1.5 seconds. What will be...

Hi, I am currently enrolled in a first year Physics for Scientists and Engineers course at a university, but I am a biochemistry student without a physics background. I am relatively certain that the problem is a forces problem, but there is a chance that it could be energy as we have just begun...

So I have one attempt left and want to make sure my answer is correct, so double checking me would be super awesome! You are given a pendulum composed of a 0.030 kg mass on the end of a 0.42 m long massless string. The pendulum is moved 25° from the vertical and released. Find the tension in...

Homework Statement Hi everyone, I hope you're enjoying your weekends! I've been trying this question for a while not having any luck, I'm hoping someone can tell me where I'm going wrong The question is: Two boxes are connected by a rope that passes through a pulley on the corner of a...

Give the correct tension, T, in the marked rope for each situation. The rope is held so the system is stationary. All ropes and pulleys are massless and frictionless. Follow link for a picture of the pulley systems: http://i.imgur.com/2eBZpC3.jpg A) T = W B) T = W/2 C) T = W/3 D)...

A point A of the ceiling is directly above a point B of the floor 2.5 meters below. A and B are joined by a light spring of natural length 2 meters; the tension in the spring is then 20 Newtons. A Lump of Putty of weight 4 Newtons is now attached to the spring at the point 1 meter above the...

Just to clarify, if a string has a threshold of 100N, can the string be bent so that the tension in different parts individually doesn't exceed 100N yet the total force of the tensions do? My question arises because of this question: http://imgur.com/90NGY5p http://imgur.com/ObRq5QM...

Homework Statement A hanging 2.00-kg (19.6N) block begins to accelerate a 4.28-kg (41.94N) block on a horizontal surface. But a rope connected to the wall at 26.9 degrees brings the block to an equilibrium position. The coefficient of friction between the surface and the 4.28-kg (41.94N) block...

Homework Statement In the figure below, the left-hand cable has a Tension T1 and makes an angle of 58° with the horizontal. The right-hand cable has a Tension T3 and makes an angle θ3 with the horizontal. A 97.6N weight is on the left and an 84N weight is on the right. The cable connecting the...

I need help understanding why in problems tension is modeled as T-mg = ma. I understand there are different variations, but the main concept is what I need help with. For example: If i have 2 masses hanging off a pulley (m1=5kg & m2=10kg) then m1 has a downward force of 49N down. The...

I'm doing a physics lab right now and to find tension we use the equation T=m(g-a) where m is the suspended mass and t is tension. I'm not sure if g should be negative or positive. I'm guessing negative but I am not to sure.

Homework Statement Two equal spheres of mass m are suspended by vertical strings so that they are in contact with their centres at the same level. A third equal sphere of mass m falls vertically and strikes elastically the other two simultaneously so that their centres at the instant of impact...

Homework Statement The link to the problem is here, sorry I couldn't put the diagram in so thought it was better to link! I need help with both questions, the attempt is for the first question. https://www.dropbox.com/s/2stb476hp738w9l/Physics%20question.jpg Many thanks for any help...

Homework Statement http://imgur.com/vgLv6NY The figure shows a system of masses and pulleys. Assume the masses slide without friction and the pulleys have negligible mass. Calculate the tension in the string. Data: M1 = 2.1 kg; M2 = 1.4 kg; M3 = 1.6 kg; Homework Equations f=ma...

The pulley in (Figure 1) is suspended by a cord C. Suppose that m1 = 1.0kg and m2 = 3.9kg . Determine the tension in the cord that supports the pulley C after the masses are released and before one hits the ground. Ignore the mass of the pulley and cords. I'm having trouble getting started...

Homework Statement A building is on fire and the occupant of a room ties together some bed sheets, attaches them to something immovable in the room and throws the bedsheet ‘rope’ out the window. The person weighs 800 N and the bed sheets can only hold a force of 600 N before they break. If...

The figures below represent capillaries of varying construction and arrangement. The diameter of the capillary portion is the same in each case, and all of the capillaries are constructed of glass, except where otherwise indicated. The equilibrium rise for water is shown at the left. Draw...

Work done by tension is... Answered.