Rope Definition and 835 Threads

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 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...

A flexible rope of mass m and length L = L1 + L2 hangs over a frictionless peg. What is the speed of the rope when it just slides off the peg? (it is reasonable to assume that the rope is uniform and that the masses of each section 1 and 2 are concentrated at the midpoint) In the picture L1...

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...

Hello everyone, First of all, I want to excuse for my not perfect English since it isn't my mother tongue. However, now to my problem, which I'm facing at the moment. As part of my master thesis I have to simulate the application of a fastening device, which I develope during my master...

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 Block A weighs 60N and rests on top of block B which weighs 80N and rests on an incline plane with angle of elevation 30 degrees. Block A is restrained by a mass-less rope as shown. What force F will cause block B to start moving down the plane? Assume all surfaces have a...

Homework Statement A (smooth) rope of length L and mass m is placed above a hole in a table. One end of the rope falls through the hole, pulling steadily on the remainder of the rope. Find the velocity of the rope as a function of the distance to the end of the rope, x. Ignore friction of...

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...

Hello, Homework Statement I'd like to find P=F dot v that a monkey of mass m must exert upon climbing up a closed loop of rope of mass M, wrapped around a massless pulley, so that it (viz. the monkey) at any given moment remains in the same place. The rope is constantly tight and at t=0 the...

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...

A uniform heavy rope of length 2l goes over a small smooth pulley such that the right end has length (l+a) while the left end has length (l-a). The shorter portion is held and then released. Find the time taken for the rope to slip off the pulley.

Given two equal mass bodies, moving in opposite directions with equal momentum, attached by rope. When the rope becomes tort, what happens? Does the momentum cancel out and they become close to at rest? Or do they move inwards at some rate? This question came up after watching Gravity :). This...

Homework Statement A man standing on a 15 m high cliff tries to swing on a 12 m rope and let's go at 30° of the horizontal (travelling 150°). He let's go and travels through the air, to then land on the ground. What is his distance from his landing spot to the base of the cliff...

Homework Statement A man is trying to swing from a 15 m high cliff on a 12 m long rope. (the rope is horizontal at the start) He let's go when the rope is 30° degrees from the horizontal of the other side. (totaled swung angle is 150°. How far does he go from the cliff? Homework...

Homework Statement A girl with a mass of 40 kg is swinging from a rope with a length of 2.8 m. What is the frequency of her swinging? Homework Equations I could find the period of the situation and then from there could calculate the frequency. For the period I'm not sure what...

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...

Homework Statement A bucket of mass 2.00 kg is whirled in a vertical circle of radius 1.10 m. At the lowest point of its motion the tension in the rope supporting the bucket is 25.0 N. (a) Find the speed of the bucket. (b) How fast must the bucket move at the top of the circle so that the...

please an answer -- 2 crates, a rope and friction here is the problem image http://tinypic.com/r/qxrqdu/5 Weight A is connected via a string to Weight B. Weight B is connected to a string to Weight C. Mass of A is 21 KG. Mass of B is 5 KG. Mass of C is 10 KG. the kinetic...

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...

Homework Statement Homework Equations mv^2/r v^2/r The Attempt at a Solution My physics midterm is tomorrow and I was doing review today, so I did this question, then looked at the professor's solutions. For the radius in both equations he used the length of the rope, but...

Homework Statement A hiker plans to swing on a rope across a ravine in the mountains, as illustrated in the figure, where L = 4.0 m and x = 1.8 m, and to drop when she is just above the far edge. At what minimum horizontal speed should she be moving when she starts to swing(in m/s)? Homework...

Help Please -- Ball swinging from a rope Homework Statement A ball of mass 30 kg is hanging from a rope of 3 meter tied to the roof of a truck. The truck is moving at a constant speed of 29.6 m/s. As you look forward at the ball hanging from the roof of the truck, you see the ball hanging...

Homework Statement A 100 kg man holds up a 1000 kg weight by holding on to a rope that is wrapped around a stationary horizontal rod whose other end is tied to the suspended weight. If the coefficient of static friction between the rope and rod is 0.5, what is the minimum number of times that...

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 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...

Greetings; I am a firefighter so physics is pretty much Greek to me. I work primarily as a rope rescue/USAR tech. We work a lot with rope, pulley's, and anchor points. All of these systems have angles that affect the loading in our system. Now I been taught rules of thumb when constructing a...

Homework Statement A rope of mass M and length ##l## lies on a friction less table, with a short portion, ##l_0## hanging through a hole. Initially the rope is at rest. a. Find a general solution for x(t), the length of rope through the hole. (Ans: ##x=Ae^{\gamma t}+Be^{-\gamma t}##...

Homework Statement PROBLEM: Choose a pair of measurements of the forces from parts A5, A6, or A7, where the forces on the sensors were quite different. Imagine there was an angle between one cart and the string. Assuming that the larger force was the true tension in the string, what is the...

Why in the provided explanation the mentioned triangles are similar? Thanks in advance

Two blocks with different mass are attached to either end of a light rope that passes over a light, frictionless pulley that is suspended from the ceiling. The masses are released from rest, and the more massive one starts to descend. After this block has descended 1.24 m, its speed is 3.27 m/s...

Homework Statement A 12.0kg bucket is lowered vertically by a rope in which there is 163N of tension at a given instant. What is the acceleration of the bucket? Is it up or down? Homework Equations Ft - mg = ma The Attempt at a Solution I solved for 'a' and got a = 3.78 m/s^2...

Hi I'm having trouble understanding this situation. Appologies if I posted in the wrong place, this is pretty simple but it's not really a homework question. A horse is attached to a large stone by means of a rope (modelled as light and inextensible). Let the mass of the horse be m and the...

I'm in the process of designing an escape system that uses a metal rope. I'm hoping to use a stopper so that the cable is not pulled too far and came across the attached. Unfortunately i do not know the jargon to be able to research it (Possible Materials, strength, sizes, etc) and was hoping...

Recently I entered a competition to join a club. The task is to make a "thing" that climbs a rope. The rope is about 1/2 a centimeter thick and it is graded on design, speed, and overall in general. I was wondering what might be a good design for this project and what materials I should use? It...

Hi, this is my first posting on this forum in the hope someone could assist me with a calculation. I have read several threads which I think partly covers my problem but to be honest the example answers given are way beyond my comprehension. Basically I need to raise a platform which runs...

Hello, Homework Statement A rope of mass M and length L is tend with tension T between two rings free to oscillate along a rod parallel to the y axis. Initially the rings are maintained at y=0 while we give to the rope a y(x,0)=dsin²(pix/L). Give the complete expression of motion of the rope in...

Homework Statement The diagram shows two pulses, each of length , traveling toward each other at equal speed in a rope Which diagram below best represent sthe shape ofthe rope when both pulses are in region AB? Homework Equations The Attempt at a Solution The answer is the...

Hi, Homework Statement A rope of length L, linear density u is streched with tension T between a wall and a ring of negligible mass free to move vertically along a rod without friction. As the ring is maintained at y=0, we give to the rod a y(x,t=0) = sin(πx/L) form. We release the ring and...

The Troposkien (skipping rope curve) - Variational principle approach Homework Statement Consider a chain of length l and homogeneous mass density ρ rotating with constant angular velocity ω with respect to an axis which bounds the two ends. There is no gravity acting on the system, and and d...

Homework Statement Two people, each with a mass of 70 kg, are wearing inline skates and are holding opposite ends of a 15 m rope. One person pulls forward on the rope by moving hand over hand and gradually reeling in more of the rope. In doing so, he exerts a force of 35 N [backwards] on...

equilibrium -- A rod influenced by multiple rope tensions Homework Statement Smooth and identical rod has a weight of P. The rod seems to be in equilibrium with X and Y which has a weight of P. What can be the weight of X according to the values below?(ip means rope) P , 6P or 9PHomework...

I'm having difficulty understanding why the radius is not represented by r, but Lcostheta , isn't the entire rope in the horizontal direction? There is something I'm missing. Thanks. (Hopefully I posted this correctly.) Homework Statement The problem is example 1 on...

Homework Statement Find the tension of a rope with a hanging mass of 0.5kg that falls with an acceleration of 0.44ms^2 Homework Equations T = ma T = ma-mg The Attempt at a Solution T = mg = 0.5*9.81 = 4.905N, I would assume that this is correct for a static load on the...

Homework Statement A uniform rope with length L and mass m is held at one end and whirled in a horizontal circle with angular velocity ω. Homework Equations At a point on the rope a distance r from the end that is held what is the tension F? The Attempt at a Solution Clearly the...

An energetic father stands at the summit of a conical hill as he spins his 25kg child around on a 5.7kg cart with a 2.4m long rope. The sides of the hill are inclined at 22º. He keeps the rope parallel to the ground, and friction is negligible. What rope tension will allow the cart to spin with...

Homework Statement Referring to https://www.physicsforums.com/showthread.php?t=561140 The figure shows two 2.5 kg blocks connected by a rope that has a mass of 450g. The entire assembly is accelerated upwards at 7.4 m/s^ What is the tension at the at the top end of the rope, near...

Homework Statement The coefficient of static friction between a rope and the table on which it rests is μ. Find the fraction of the rope that can hang over the edge of the table before it begins to slip. Express your answer in terms of μ. Homework Equations The Attempt at a...

A car is connected to a tree by a length of rope tied tightly. A 115 lb woman steps in the middle of the rope causing it to deflect by 15 degrees.1) What is the force applied to the car? 2) What is the force applied to the tree? 3) How much force does the woman apply to the rope? For...