Rope Definition and 824 Threads

Homework Statement Problem 3.12 from Kleppner & Kolenkow A ski tow consists of a long belt of rope around two pulleys, one at the bottom of a slope and the other at the top. The pulleys are driven by a husky electric motor so that the rope moves at a steady speed of 1.5 m/s. The pulleys are...

Ok, so there is a little discussion going on in my circle of associates at the moment regarding rope break dynamics: http://esinem.com/news/rope-friction-break-tests If you watch both videos, you can see that some ropes (usually the synthetic ones) will saw through the static bight of the...

Hello Guys, I need little help currently I am working with on a Project that includes Motor Pulley and rope combination. The previous version of our Test bench was having a Motor pulley and rope and the rope was wrapped around the pulley as in most of the cases, but now I am trying to optimize...

Would it be correct to assume that if the linear density of a rope changes by a factor of k, then the amplitude of a wave traveling on the rope would change by a factor of \frac{1}{\sqrt{k}}? (Assuming tension and frequency are fixed.) I get this by assuming the average power of the wave is...

Hello, So the main features of the physics of tight roping, would be concepts such as tension in the rope, center of mass, and rotational inertia? Does anyone else have any ideas? this would be related to the physics of circus act in which someone is walking across a rope. Cheers!

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...

Hi. I'm trying to figure out what the forces will be in two differing circumstances. ROPE Let's say at one end a person is pulling a rope to the left with 120N force. At the other end a person pulling with 120N force. I know the tensile force inside the rope is 120N at any point along the rope...

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 X . . . . .Rope . . . . Bulb >>> Light -----> V Hot bulb is making rotation . Exist C + V ? Michelson Morley X1..............solar system Not exist C+V = only Source is making rotation around X1 ? X1 - far far point in space Homework Equations C = 300...

Homework Statement A uniform rope of length L lies in a lump on a frictionless table. a very small piece at one end is held hanging down through a hole in the table just below the lump. This system is released, and the rope slides down through the hole. What is the speed of the other end of...

Homework Statement The problem is from a worksheet and is a picture so I will try to describe the picture. A 3kg block and a 7kg block are connected by a rope and the 7kg block is falling from a table and the 3kg block is on the table. We are supposed to find the acceleration of the 3kg block...

A 10 kg monkey climbs up a massless rope that runs over a frictionless tree limb and back down to a 15 kg package on the ground. Part a) What is the magnitude of the least acceleration the monkey must have if it is to lift the package off the ground. Professor's solution says:The force the...

So I am designing an apparatus to lift a 500g load up 500mm and I am trying to find reactions. I have filled in these values in my head with my own logic but I don't know how to do the maths and if I am right or not. I can do the initial position ok but it is the final position I am unsure of...

Homework Statement A rope is connected between two fixed points that are separated horizontally from one another by 10 m. The point on the left at a height of 5 m [coordinates (0,5m)], and point on the right is at a height of 10 m [coordinates (10m,10m)]. A 100 lbs weight hangs from the rope...

Homework Statement A uniform rope of length L and mass M is held on a frictionless table by a force F. One fourth of its length (¼L) is hanging over the edge. Find the work required to pull the hanging part back onto the table. Homework Equations W=Fd The Attempt at a Solution I have no...

I am having a bit of difficulty with the concept of unequal tension in a rope. What are the conditions for unequal tension? I read that the tension is the same when there is no acceleration. Why is this the case? Can someone explain this concept to me? Thanks :)

A puck of mass 'm' on friction-less ice is attached by a horizontal string of length 'l' to a very thin vertical pole of radius R. The puck is given a kick and circles around the pole with initial speed V. The string wraps around the pole, and the puck gets drawn in and eventually hits the pole...

Homework Statement A rope of negligible mass is stretched horizontally between two supports. When an object of weight 3160N is hung at the centre of the rope, the rope is observed to sag by 35.0cm. What is the tension in the rope? Homework EquationsThe Attempt at a Solution [/B] Sum of...

A boat pulls two barges down the river. The barge connected to the boat (barge A) has an inertia of 2x10^5 kg, and the other barge (barge B) has an inertia of 3x10^5 kg. the resistive force between barge A and the water is 7x10^3 N, and the resistive fore of barge B to the water is 9x10^3 N. The...

::A mail bag with a mass of 105 kg is suspended by a vertical rope of length 7.00 m . A) What horizontal force is necessary to hold the bag in a position displaced sideways a distance 3.00 m from its initial position? Take free fall acceleration to be g = 9.80 m/s2 . B) How much work is...

An m = 12.4kg mass is attached to a cord that is wrapped around a wheel of radius r = 10.0cm (see the figure below). The acceleration of the mass down the frictionless incline is measured to be a = 2.10m/s^2. a) Assuming the axle of the wheel to be frictionless, and the angle to be θ = 36.2deg...

Homework Statement [/B] A uniform rope of length L and negligible stiffness hangs from a solid fixture in the ceiling The free lower end of the rope is struck sharply at time t=0. What is the time t it takes the resulting wave on the rope to travel to the ceiling, be reflected, and return to...

Homework Statement A m1 = 7.3 kg block and a m2 = 10.2 kg block, connected by a rope that passes over a frictionless peg, slide on frictionless incline. (a) Find the acceleration of the blocks and the tension in the rope. (b) The two blocks are replaced by two others of masses m1 and m2...

If one simply swings a rope with an object tied to the end of it, the object describes a circle. But if one were to create a contraption that caused the radius of the rope to periodically decrease 4 times every revolution, one could cause the path of the object to describe a square. My...

Homework Statement A limp rope with a mass of 2.4 kg and a length of 1.5 m is hung, initially at rest, on a frictionless peg that has a negligible radius, as shown in the Figure. y1 is equal to 0.48 m. What is the vertical velocity of the rope just as the end slides off the peg? Homework...

Is there a better way to tie the bucket than single knot on the handle? Or type of rope to use...that would increase speed of the spin? Mine just don't spin that fast at all.. Plastic bucket.. The concave is quite small compared to some I've seen done before.. Any better way to set it up?

Homework Statement https://drive.google.com/file/d/0B_pCZXb8oZhtZWg2Q0hxTHBZSUE/edit?usp=sharing Problem 2.44Homework Equations Primary trigonometric ratiosThe Attempt at a Solution https://drive.google.com/file/d/0B_pCZXb8oZhtS2haUUFPXzlicHM0Z0pDd2xCQW9SRENrbnln/edit?usp=sharing[/B] The...

Homework Statement I am given the weight (force) of the rope as W. It sits on a cone about halfway down, with the cone's top angle ø. Radius at a given placement is r, and h is our height at a given placement. I need to find the tension, T, in the rope. Homework Equations W=mg Integral (F *...

A rope is wrapped around a pole with one end attached to a large object and the other end pulled with a tension T. The rope does not slip. I am confused why the tension varies within the rope. How would I know that the static friction force is non-zero?

Homework Statement Determine coordinate direction angle γ of the resultant force acting at B. Homework Equations Cos\gamma = F\underline{}z/F The Attempt at a Solution The first part was to find magnitude of F\underline{}b. The next part was finding the other coordinate...

A rope of length L1 is stretched from both ends by A and B ( both are exerting equal amount of force F1 and F2, where F1=F2)to keep it rigid. Just then C ties a metallic block of mass M1 at the center of the rope.Due to the weight of the block, the rope hangs down and creates a depression of D1...

When 2 unequal vertical forces act on the 2 ends of a vertical rope, how do I calculate the tension at the midpoint? First I calculated the net acceleration of the rope, then I choose any 1 half of the rope for fbd of it and then where and how does the tension act?

Homework Statement Two blocks shown in figure are connected by heavy uniform rope of mass 4kg. An upward force of 200N is applied as shown. (a)What is the acceleration of the system? (b)What is the tension at the top of heavy rope? (c)What is the tension at the mid-point of the rope?Homework...

Will the tension at various points of a wire rope remain same when subjected to tension? for example let us assume that a wire rope is pretensioned and held between to fixed supports .So will the tension remain the same at the center and either of the anchorage points.

Let \lambda be a linear density of a rope which is moving into a scale at velocity v. The additional force on the scale due to the collision is given as \frac{d p}{d t} = v\frac{d m}{d t} = \lambda v^2 Where as the stagnation pressure from stopping a column of water in excess of static...

This is a problem I thought up. If I'm correct as far as I've gone, the answer is rather surprising. A thin but 'massive' rope lies coiled on a floor. Treat the coil as a point. One end passes vertically up and over a smooth cylindrical drum radius r. The centre of the drum is height h...

hey, I'm currently going through a mechanics course on edx.org . And part of last's week homework was this problem. well okay I don't know how to add images so I'm going to try my best to describe it. There is a platform has a mass of 200kg. From that platform a rope hangs( with tension TA...

Homework Statement On the end of ##1m## long elastic rope a ##50g## mass is hanged, therefore the rope extends for ##20cm##. Than we lift the mass to the point where rope is attached to the ceiling. Now we release the mass and let gravity do the work. How many seconds will pass until the body...

Homework Statement A 82 kg sled is pulled forward from rest by a snowmobile and accelerates at 2.0 m/s2 [forward] for 6.0 s. The force of friction acting on the sled is 120 N [backwards]. The total mass of the snowmobile and driver is 460 kg. The drag force acting on the snowmobile is 540 N...

a rope of 1.20 m length has at one end a tie slide and in another a collar that attaches to a dog. The rope is passed through the sliding laze and around a square column of 24 cm from side to keep the tied-up dog while his master departs; but the dog pulls rope, and manages to break it by the...

If a person hangs still from a rope some distance above water and then the rope is cut off, is it possible for the person to start somersaulting in the air before hitting the water? When I try to imagine myself in this situation, I would think that "of course it is, one can just start moving in...

So, I lay a rope into a black hole, rope leaves the reel at velocity 0.99 c. When I observe the lower end of the rope, I never see it reaching the event horizon. Can I see some slack rope somewhere sometime?

A rope is used in a tug-of-war between two teams of five people each. Both teams are equally strong, so neither team wins. An identical rope is tied to a tree, and the same ten people pull just as hard on the loose end as they did in the contest. In both cases, the people pull steadily with no...

Homework Statement One end of a rope is fixed to a vertical wall and the other end pulled by a horizontal force of 20N. The shape of the flexible rope is shown in the figure. Find its mass. Homework Equations...

Question: Two positive charges q(a) and q(b) and masses m(a) and m(b) are at rest, held together by a massless string of length d. Now the string is cut, and the particles fly off in opposite directions. How fast are each going when they are far apart.My attempt: From this the first thing I...

The tension in the rope is actually being provided by a solid sphere with radius 23.5 cm that rolls down an incline as shown in the figure. The incline makes an angle of 32° with the vertical. The end of the rope is attached to a yoke that runs through the center of the sphere, parallel to the...

A rope is tied to a large crate, which is sitting on a flat surface. The coefficient of static friction between the crate and the ground is 0.9. If a person is to pull on the rope with the minimum force needed such that the crate begins to slide, the angle between the rope and the ground should...

Suppose the rope involved in the pulley is massless and experience no friction. Why is the force on the right hand side equal to the tension experienced by the rope on the left hand side?

Some time ago, I came across this page on Wikipedia. The problem is interesting, and I understood it. There used to be a small part on the bottom that said something like 'One can stack a block, such that it overhangs off the table, and put more blocks on the first one to make the overhang...

If I needed to calculate the kinetic energy of a bar suspended by a rope at one of its ends, in other words, a bar pendulum, do I need to calculate the kinetic energy of the center of mass plus the kinetic energy relatively to the center of mass or do I need to calculate the kinetic energy of...