pulley problem Definition and 171 Threads

Homework Statement m1 has a mass of 47 kg and m2 has a mass of 35 kg. the coefficient of friction between m1 and the surface of the inclined plane are us=.42 and uk=.19 m1 is on an inclined plane angled 25 degrees A) if the masses are held in place and then released, will they start to move...

Homework Statement An object of mass m1 =45kg sits on a horizontal frictionless table. A rope is attached to it , which runs horizontally to a frictionless pulley , then down to a hanging mass m2 = 5kg a) the acceleration of each mass b) the tension in the rope Homework Equations...

Problem As shown below, Block A has mass 'M' and rests on a surface with a coefficient of kinetic friction 'Uk' .The cord attached to A passes over a pulley at C and is attached to a block B of mass '2M'. If B is released calculate the acceleration of A. Assume the cord does not slip over the...

This question seems incredibly straightforward, but my lecturer had a different answer to what I ended up with. Essentially there's a painter with a mass of 70kg sitting on a chair of 10kg that is attached to a pulley on the roof via a rope (the pulley and rope are ideal,massless and...

In the attached picture, one sees a pulley with a mass which is holding two different weights. In chegg, the tension due to a weight is represented as a downward direction. Then, when the tension is seen in relation to the pulley, the direction switches for both weights. WHY IS THIS...

Homework Statement A light rope is attached to a block with mass 4.00 kg that rests on a frictionless, horizontal surface. The horizontal rope passes over a frictionless, massless pulley, and a block with mass m is suspended from the other end. When the blocks are released, the tension in...

Homework Statement http://media.cheggcdn.com/media/76d/76dd5c56-43a5-44d3-b8b8-40ba63a9010a/phpYYNJyN.png Cable ABC has a length of 5 m. Determine the position x and the tension developed in ABC required for equilibrium of the 100 kg sack. Neglect the size of the pulley Homework...

Homework Statement The problem is based in the diagram (the jpg attached). All pulleys are ideal pulleys, and the hanging surface is massless. the problem states that the guy with mass m pulls each string with a force F, and asks to solve the value of F in terms of m and g. Since the...

Homework Statement "What are the input forces needed to lift the 200 N load for the arrangement shown?" Notice how there are two movable pulleys that move in opposite directions as the weight is lifted. That is the confusing part to me. Homework Equations Ma=Fo/Fi The Attempt at...

First off,I would like to apologise for not introducing myself. I have yet to find that certain part of the forum,but if the mistake was on my part,mods please direct me. Now to go to the real issue. This is something I've long "gotten over",meaning it was in the introductory lessons in...

A 3.8-kg sphere is suspended by a cord that passes over a 1.3-kg pulley of radius 3.5 cm. The cord is attached to a spring whose force constant is k = 86 N/m as in the figure below. Assume the pulley is a solid disk. (a) If the sphere is released from rest with the spring unstretched, what...

Homework Statement Consider 2 masses (m1=13kg, m2=26kg) connected by a string. The pulley is a uniform disc of radius R=0.05m and mass m=1kg. μ between the horizontal surface and the larger mass is 0.2. Find Frictional force acting on larger mass. Find the linear acceleration of the...

There are two bodies of mass 5kg and 1 kg on either sides of a pulley. (The string stays vertical and straight at all times). The heavier mass is doubled. The downward acceleration on the string of the hevier mass is "x". Find "x" when g=10m/s-2. Please help fast! Desperate!

Can someone explain why the force P with which the man must pull on the rope to achieve an acceleration a m/s2 IS NOT (m+M)(a+g)/2 and is instead (m+M)(a+g). M+m is the combined mass of man and platform. Why does 2T-(M+m)g=(M+m)a not work here?

There is no friction and the strings are massless. Find Tension and acceleration. 3. The Attempt at a Solution 1. +T-m1g = m1a 2. m2g-2t= m2a 3. +T - m3g =m3a 4. 2a2 = a1+a3 g(-m1+m2-m3) + 2a2 = (m1 + m2 + m3)a + a1 + a2 -29.4 + 2a2 =11a +a1+ a2

Homework Statement Sorry guys but uploading the image didnt work so i post it on imageshack. Here is the link: http://imageshack.us/f/208/apib.jpg/ So the quastion is: In the image the pulley is a uniform cylindrical disk of mass m and radius r. The strings are massless and there...

Homework Statement A 1.53-kg mass hangs on a rope wrapped around a frictionless disk pulley of mass 7.07 kg and radius 66.0 cm. What is the acceleration of the mass? I know this has been posted before but I learn better when I try to solve things on my own. Homework Equations F...

Homework Statement m(1) is 20kg m(2) is 30kg gravity use 10 U static is .6 u kinetic is .4 Homework Equations Basically my professor gave the answer to the question in the link along with the picture. The only problem is that i am not sure he did case three right and i am after...

Homework Statement In the diagram, the pulley is frictionless and the ropes are massless. You are given that m1 = 10.0 kg and m2 = 29.5 kg. Calculate the acceleration of m2 downwards. What is the magnitude of the tension in the string? Homework Equations sum of F= M*A The Attempt at a...

Homework Statement Consider two masses of 3.3 kg and 7.4 kg connected by a string passing over a pulley having a moment of inertia 12 g · m2 about its axis of rotation, as in the figure below. The string does not slip on the pulley, and the system is released from rest. The radius of the...

Homework Statement The masses of blocks A,B, and C are 4kg, 10kg and 2kg respectively. Knowing that P=0 and neglecting the masses of the pulleys and the effects of friction, determine a) the acceleration of each block and the tension in the chord. Homework Equations Fnet=ma The...

Homework Statement 2 blocks that have the same mass are connected by a string and passed over a pulley. The angle made by the horizontal plane and the ramp is 30 degrees. 1 of the blocks is dangling off the edge of the ramp while the other block is placed on the ramp. If neither block moves...

Homework Statement A simple Atwood machine composed of a single pulley and two masses, m1 and m2 is on an elevator. When m1= 44.7kg and m2=45.3kg, it takes 5.00s for mass m2 to descend exactly one meter from rest relative to the elevator. What is the elevator's motion? (That is, is it moving...

Homework Statement A 0.840- kg glider on a level air track is joined by strings to two hanging masses. As seen in the figure, the mass on the left is 4.85 kg and the one on the right is 3.62 kg The strings have negligible mass and pass over light, frictionless pulleys. Find the acceleration of...

Homework Statement The pulley is essentially weightless and frictionless. If M1= 10.0 kg and the second mass M2 weighs 98.1 Newtons, what is the tension in the rope and the acceleration of M1 ? Homework Equations FT=mg F=ma FT = tension m=mass g=gravity (9.81) a=acceleration The Attempt at a...

While looking for interesting problems, I was led to a problem involving infinite pulleys. The problem and solution can be found http://www.feynmanlectures.info/solutions/infinite_pulleys_sol_1.pdf" . Now I follow the solution up to the part where he claims \frac{1}{4^{i}M_i} is always...

This question this struck me as fairly simple until I repeatedly tried and failed to get the right answer so any help would be greatly appreciated. Homework Statement A block of mass 30 tonnes is to be dragged across the floor by means of the smaller body (mass 5 tonnes) acting through the...

Homework Statement problem #62 Homework Equations Torque = F * radius Tangential accel = radius * alpha w = mg Kinematic equations for linear motion The Attempt at a Solution I tried to find the net torque and go from there. For clockwise torque I got T = 10 * .25 = 2.5 Nm...

Homework Statement Two 0.25 kg blocks are connected by a thread that passes over a frictionless pulley. The thread has no mass, and no friction. The two blocks are in balance. If a third block that weighs 0.20 kg is put on one of the blocks, then what is the acceleration of the 0.20 kg block...

Homework Statement http://img849.imageshack.us/img849/3716/staticeqpulley.jpg Hopefully the image showed up. If not, here's the link: [PLAIN]http://img707.imageshack.us/img707/3716/staticeqpulley.jpg" Sorry for the low quality pictures. Hopefully it will do though. The question is: Relate...

Movers have to haul a piano up to a window that is 5 floors above the ground. They decide to use a pulley system with 6 strands of rope. if the movers can exert a total force of 1111 N, how heavy a piano can they hoist? It doesn't say where the movers are standing but I'm assuming on the...

Homework Statement In Fig. 9.2, two blocks, of masses 2 kg and 3 kg, are connected by a light string that passes over a pulley of moment of inertia 0.004 kgm^2 and radius 5 cm. The coefficient of friction for the table top is 0.30. The blocks are released from rest. Using energy methods, one...

[b]1. A 2.5 kg block and a 1.5 kg block are attached to opposite ends of a light rope. The rope hangs over a solid frictionless pulley that is 30 cm in diameter and has a mass of .75 kg. When the blocks are released, what is the acceleration of the lighter block. Ok, the book says 2.2m/s^2...

EDIT: I just realized I have to use the tension as the force and not simply mg. It's been a while since I dealt with these problems and that slipped my mind. I think I get it now, sorry. I can't figure out where I'm messing up on this. This is not a homework problem, bear with me as I try...

Homework Statement An object of mass m_1 hangs from a string that passes over a very light fixed pulley P_1. the string connects to a second very light pulley P_2. A second string pases around this pulley with one end attached to a wall and the other to an object of mass m_2 on a...

Homework Statement A 28.5 kg block (m1) is on a horizontal surface, connected to a 6.10 kg block (m2) by a massless string. The frictionless pulley has a s R = 0.087 m and a moment of inertia I=0.140 kgm2. A force F = 231.3 N acts on m1 at an angle theta = 30.5°. There is no friction between...

Homework Statement A mass M is held in place by an applied force , FA , and the pulley system shown in the figure below. The pulleys are massless and frictionless. Express the tension in each section of the rope, FT1, FT2, FT3, FT4, and FT5, as well as the applied force, FA , in terms of M...

Homework Statement Two blocks with masses m = 2kg and M = 3kg are connected by a cord that passes over a massless and frictionless pulley. The system is released from rest. Find the tension T in the cord and acceleration of the masses. Homework Equations F = m*a Q = m*g The...

Homework Statement you need to see the picture for this one http://s861.photobucket.com/albums/ab174/alkaline262/?action=view&current=prob13.jpgHomework Equations f=ma The Attempt at a Solution i don't really know where to start on this one. i have the equations for force 2T - m2g =...

Homework Statement A 24 kg block with a pulley attached slides along a firctionless surface. It is connected by a massless string to a 5.3 kg block via the arrangement shown. a) Find the acceleration of the 24 kg block. b) Find the tension in the connecting string. Homework Equations...

Homework Statement Three blocks are connected on the table as shown below. The table is rough and has a coefficient of kinetic friction of 0.420. The objects have masses of 4.00 kg, 1.00 kg and 2.00 kg, as shown, and the pulleys are frictionless. Determine the acceleration of each object and...

In the calculation of the theoretical speed vtheo. = √(F_T/μ) (7), the mass associated with the length of the string hanging over the pulley was not taken into account. Suppose that the length of string hanging over the pulley is 20cm and that the hanging mass is 100 grams. What percentage...

I have a basic pulley problem which has been troubling me. Consider the system as shown in the attached picture. We have a massless pulley attached to the ceiling and a mass suspended from one side of the pulley. If we take the free-body-diagram by 'cutting' where the red box is, we find...

Homework Statement A 1.5 kg block and a 2.5 kg block are attached to opposite ends of a light rope. The rope hangs over a solid, frictionless pulley that is 30 cm in diameter and has a mass of .75 kg. When the blocks are released, what is the acceleration of the lighter rock? Homework...

pulley problem :D Homework Statement Find the acceleration and tension of the system. there were no values given so i assumed that our teacher wants the answer in terms of m, M, g, a, T, F. http://img202.imageshack.us/img202/8615/picture1gz.th.jpg Uploaded with ImageShack.us Homework...

Homework Statement A frictionless, massless pulley is attached to the ceiling, in a gravity field of 9.81 m/s2. Mass M2 is greater than mass m1. The quantities T1, T2, T3 and g are magnitudes. The Attempt at a Solution The Options are Greater than, Less than, Equal To T1 is...

Sorry, I was not aware of the correct format. Thanks for the kindly input!

Homework Statement the problem statement is in the pic. Homework Equations inertia for cylinder shape= m*r^2*1/2 torque=F*"length sum of torque= "inertia" * "angular acceleration" w=mg The Attempt at a Solution i was thinking that the weight forces of the masses times the...

Homework Statement Part 1: A 17 kg block with a pulley attached slides along a frictionless surface. It is connected by a massless string to a 5.9 kg block via the arrangement shown (attached below). The acceleration of gravity is 9.81 m/s/s. Find the horizontal distance the 17 kg block...

hi can some one please help me with this for an exam? A 33.5 kg block (m1) is on a horizontal surface, connected to a 7.10 kg block (m2) by a massless string. The frictionless pulley has a radius R = 0.081 m and a moment of inertia I=0.110 kgm2. A force F = 244.9 N acts on m1 at an angle θ...