Rope Definition and 824 Threads

Homework Statement A man brushes the end of a rope that sends a pulse up the rope to the fixed end of the rope and back down to the bottom. How long does it take the pulse to make the trip from the bottom of the rope, to the top, and back? Let the length of the rope be l and its mass m...

Suppose you put two weights at each end of a string or rope and then throw it away. As we all know the weights will circulate around the center of mass. Now the problem is what is the tension of the string. I am confused about this since there seem to be two contributions to the tension...

Homework Statement Two traveling transverse waves propagate down two long ropes under the conditions that the linear mass density, tension, and transverse displacement amplitude for the two ropes are the same, but that one rope has twice the length of the other. If the shorter rope has a...

a rope is wrapped tightly around the Earth (radius 250000). The rope is cut and 3 feet are added to it and the ends are reconnected. Again it is wrapped around the earth. How much space is now between the rope and the earth so C_{0} =2piR and C=2pi(R+x) so to find the height is ti...

Hi all. Suppose we have two objects A and B, and suppose we tie a rope R to the objects with the rope R's two edges hooked to a pole or hook on each of the objects. The rope is loosely connected to the hooks on such a way that as objects will move away from each other, then as the rope will...

Homework Statement A loaded sled is pulled by means of rope that makes an angle of 45 with the horizontal. If the mass of the sled is 60 kg and the coefficient of friction is .0200, how much work is done in pulling the sled at constant velocity along a level road for a distance of 1.00 km...

Homework Statement A uniform rope of mass \lambda per unit lengt is coiled on a smooth horizontal table. One end is pulled straight up with constant speed v0. a. Find the force exerted on the end of the rope as a function of height y. b. compare the power delivered to the rope with the...

Homework Statement A long, uniform rope with a mass of 0.100 kg per meter lies on the ground. You grab one end of the rope and lift it at the constant rate of 1.20 m/s. Homework Equations Center of mass? [SIGMA]mx/M The Attempt at a Solution I honestly have no idea where to even...

Homework Statement Two pulses of the form e^-(x + 4)^2 e^-(x - 2)^2 travel in opposite directions along a tensed non dispersive rope. If the speed of propagation of both pulses is 2 cm/s, find the instant of time in which the wave's amplitude goes to zero, if it exists. Homework...

Homework Statement A cylinder, with a rope wrapped around it, is placed on top of an inclined plane.If the speed of the cylinder in the bottom of the plane, when the angle of the plane is 30 degrees, is 1m/s, find what speed will the cylinder have when it is placed on a plane with an angle of...

Homework Statement A rope, under tension of 120 N and fixed at both ends, oscillates in a second-harmonic standing wave pattern. The displacement of the rope is given by y = (1.18 m)sin ( x / 2) sin (10 t), where x = 0 at one end of the rope, x is in meters, and t is in seconds. (a)...

1. A 1000kg mass is lowered by a rope. If the mass is initially moving at 10m/s, and is decelerating at 1m/s2, what is the initial tension T in the rope? 2. T = mg 3. So I tried setting up T = mg, and then since it is decelerating the tension must be less than what it would be if...

Hello hope you're doing well :smile: Homework Statement I'm having a great problem understanding Newton's third law let's say that we have 2 bodies with masses m1 & m2 where m1>m2 the 2 bodies are connected with a rope body1________body2----->F a force F is applied on body 2 as shown...

Why anyone is not answering this question... Homework Statement a uniform rope of mass m hangs freely from the ceiling. A bird of mass M climbs up the rope with an acceleration A. the force exerted by the rope on the ceiling is Homework Equations T = mg + M(g+a) is answer The...

Homework Statement If the coefficient of static friction between an table and a uniform massive rope is [tex]\mu[s] what fraction of the rope can hang over the edge of the table without the rope sliding? b]2. Homework Equations [/b] The Attempt at a Solution Frictional force...

Hey can someone help me with this question? Thanks Homework Statement Goferd is getting buff by swinging a 25.0 kg ball in a near - horizontal arc. If the length of the rope that is attached to the ball is 2.00 m, and Goferd maintains a constant tension of 100. N in that rope, how many rpm...

What's the tension on a rope is being pulled by two kids with the same force on each side >>> What if the forces on each side are different ?

An object is pulled up by a rope from an elevator traveling upward with an acceleration of 1.4 m/s2. The tension in the rope is 30N. What is the weight of the object. A) 2.6kg B) 3.6kg C)4.6kg D)5.6kg My attempt: FT=30N asystem=1.4m/s2 Weight of object=mg The system is accelerating up, so let...

1. a 2.00-kg stone attached to a rope 4m long is whirled in a circle horizontally on a frictionaless surface, completing 5 revolutions in 2s. calculate the magnitude of tension in the rope 2. delta t = 2pie root square l cost theta/g or f= 1/2pie root square g/ l cos theta 3. is...

Homework Statement An old oaken bucket of mass 6.75 kg hangs in a well at the end of a rope. The rope passes over a frictionless pulley at the top of the well, and you pull horizontally on the end of the rope to raise the bucket slowly a distance of 4.00 m. (a) How much work do you do on the...

Homework Statement Smaller mass on an Atwood machine is 5.2 kg (m1). If the mass accelerates at 4.6 m/s2what is the mass of the object? What is the tension of the rope? Homework Equations a = g(m2-m1)/(m2+m1) The Attempt at a Solution I can't approach this questions, because we...

Homework Statement A 12.0 kg monkey starts to climb a long rope to reach a banana located at a height of 6.90 m. The rope will snap if the tension exceeds 132 N. Calculate the least amount of time the monkey could take to reach the banana without breaking the rope. Homework Equations...

Homework Statement See figure attached for problem statement as well as my FBD. Homework Equations The Attempt at a Solution I know how to relate the wave speed to the tension in the string. v = \sqrt{\frac{\tau}{\mu}} So as tension increases, so does the wave speed...

Homework Statement A muscle builder holds the end of a massless rope. At the end of the rope, a 15 kg ball is hung as shown in the figure. What is the tension in the rope if the angle \theta in the drawing is 4.5^{}o? Homework Equations g = 9.8m/s^{}2 F = mg Trigonometrical functions The...

Homework Statement In the system shown in the figure , block A has mass = 2.00 , block B has mass = 0.360 , and the rope connecting them has a nonzero mass 0.240 . The rope has a total length 1.10 and the pulley has a very small radius. Let be the length of rope that hangs vertically...

I am working on a rope system with pulleys as you see in the picture. The diameter of the rope is about 1-2 mm. I am looking for a stretching mechanism for this system. Do you know any accessories that i can use here for this purpose? Note: Rope is made of stainless steel and the...

Homework Statement A helicopter with mass 15,000 kg is lifting a truck with mass 4,500 kg up in the air with acceleration 1.4 m/s^2. The helicopter lifts using a rope. Calculate the tension of the rope and the net upward force of the helicopter. m1 = mass of helicopter = 15,000 kg m2 =...

Homework Statement A rope (steel cable) is hanging in an empty hole. What is the change of length? L = 9km E_{steel} = 2 · 1011 N/m2 p_{steel} = 7.8 · 103 kg/m3 Homework Equations The Attempt at a Solution Well, I thought that the cable could also be considered as a spring. I found in...

Homework Statement 2 identical cylinders of mass m, radius R and moment of inertia I=kmR2are connected with a rope wound around both, according to the drawing. One is falling. What is the angular acceleration of the upper one? A hint was given: the acceleration of the lower one is twice the...

Homework Statement The figure above shows an 80 kilogram person standing on a 20 kilogram platform suspended by a rope passing over a stationary pulley that is free to rotate. The other end of the rope is held by the person. The masses of the rope and pulley are negligible. You may use g...

Alrighty this problem is making me crazy. A guy is swinging on a swing where the height above ground=2ft., the length of rope=8ft., mass of guy=100kg and theta=30 degrees. The rope breaks when he is close to the ground... what is the distance that he will land on the ground? I am so lost, I...

Sydney Lumet's 12 Angry Men was filmed on one set in a room and consisted mostly of dialogue. Likewise, entire of Alfred Hitchcock's Rope was set in one apartment. what other movies can you think of which also used a small closed locaility as their filming location? Thanks.

My homework has different masses and angles but it is the same concept as the one on the link. I need help solving This problem. https://www.physicsforums.com/showthread.php?t=188644 But with a kinetic friction coefficient of 0.1. Thanks. I don't really know how to do this type of...

Homework Statement A uniform rope of mass m hangs vertically from the ceiling, with its lower end free. A disturbance on the rope travels upward from the lower end. Find the time taken by the disturbance to reach the top of the rope if the length of the rope is L. The Attempt at a...

Homework Statement A clothsline with mass M is hung from two poles, and each end makes angle [theta] with the horizontal. The middle of the rope sags under its own weight. a) what is the tension in the ends of the rope? b)the tension at the sagging point in the rope? Homework Equations...

Homework Statement A mountain climber is rappelling down a vertical wall. The rope attaches to a buckle strapped to the climber's waist 15 cm to the right of his center of gravity and makes an angle of θ = 23° with the wall. The climber weighs 616 N. The distance from his center of gravity to...

Homework Statement A man is strapped to a chair which is connected to a pulley (combined weight of chair and person = 95 kilograms). With what magnitude must the man pull on the rope if he is to rise a) with a constant velocity b) with an upwards velocity of 1.3 meters per seconds...

Homework Statement The ends of a rope are tied to (a) two horses, (b) a tree and a horse, and (c) a tree and two horses, as shown. Each horse pulls with the same magnitude force. Compare the tension in the rope for the three situations. Explain your reasoning.Homework Equations F = ma The...

Hi guys! :) Homework Statement Ok so this image may look funny, but this is actually an attempt to design a bike that can propel on water. What you are seeing is bike's handlebar (green), mounted on a support (red). Its supposed to have a rudder system at the back (gray). The pink...

1. Homework Statement [/b] Box A1 (2.0 kg) and Box A2 (5.0 kg) are slide down a ramp. They are connected by a rope (mass less) and the coefficient of kinetic friction between A1 and ramp is 0.200 and A2 is 0.100. 1) Calculate tension in the rope 2) Magnitude of the acceleration of A1/

Homework Statement Suppose a 69-kg boy and a 48-kg girl use a massless rope in a tug-of-war on an icy, resistance-free surface. If the acceleration of the girl toward the boy is 3.0 m/s2, find the magnitude of the acceleration of the boy toward the girl. Homework Equations f=ma fg=mg...

Homework Statement This image: http://i52.tinypic.com/35i0j1k.jpg, assume the table surface and pulley to be frictionless. Please ignore the given a=1.96 in the photo as I will show how I reached that further below. Homework Equations F=ma The Attempt at a Solution Well, my stab at...

Homework Statement Select a suitable steel rope to suspend a lift from a winch. The weight of the lift is variable as is the weight and diameter of the ropes the lift is suspended from. As an example, I'll use 13mm for the ropes diameter and 0.63kg/m for the rope mass, the total length of the...

A box of mass 35 kg hangs motionless from two ropes, as shown in the diagram above. The angle α is 34 degrees. Choose the box as the system. The x-axis runs to the right, the y-axis runs up, and the z-axis is out of the page. What is the x-component of the force on the block due to rope 2...

Homework Statement Hi there. Where, I got this exercise. I have a ball attached to an ideal rope with longitude L, moving on a circle with speed V on a circular trajectory with radius R over an horizontal plane. So it asks me to express the subjected force over the rope as a function of the...

situation: boat moored at the dock fact (so to say) 1 - why the longer the rope and his catenary shape the stronger it will become? assuming it is true. fact 2 - why a man can keep a heavy boat stopped with just a coiled rope in the mooring? ps..if there's a better place to put the thread...

Homework Statement Two blocks m1= 9.4 kg and m2 = 4.9 kg are connected by a homogeneous rope that has a mass of mr = 1.42 kg. A constant vertical force, F = 184.9 N, is applied to the upper block. What is the magnitude of the acceleration of the system? What is the magnitude of the...

Homework Statement A uniform rope of length L hangs freely from the ceiling. Show that the time for a transverse wave to travel the length of the rope is t0 = 2\sqrt{L/g}. Homework Equations v = \sqrt{\tau/\mu}. (Where \tau is the tension and \mu the linear density of the rope.)...

Homework Statement There is a steel beam of 1400kg hanging from the ceiling by two ropes. The first rope (R1) is 20 degrees to the left of the steel attach point, the second rope is 30 degrees to the right of the attach point. Here is the diagram...

Homework Statement 2. There are four masses hanging by a rope from the ceiling, as shown in the figure. Two of the tensions and three of the masses have been measured. Show that the fourth mass can be expressed as m4 =[m1T2/(T1 − T2)]− m2 − m3. Homework Equations F=ma, F1=-F2, T=ma...