Pulleys Definition and 384 Threads

Homework Statement If two equal masses are suspended as in the following, and they are both initially at rest, after they are released, what is the velocity of the leftmost mass at the instant the separation between the two masses is h ? Assume frictionless pulleys and extensionless strings...

Homework Statement A 24 kg block with a pulley attached slides along a frictionless surface. It is connected by a massless string to a 6 kg block via the arrangement shown. The acceleration of gravity is 9.81 m/s2 . The first part wanted you to find the horizontal distance traveled by the...

I am desiging a simple deflection test apparatus for my company. In the system I am using a few pulleys, a steel cable, a force gage, and a ratchet strap. I want to use the ratchet strap as opposed to dead weights so I can apply varying amounts of force to the test member. My question...

Homework Statement the blocks shown in the figure are connected by flexible, inextensible cords passing over frictionless pulleys. at A, the coefficient fiction is 0.30 while at B, it is 0.40. compute the magnitude and direction of the friction forces and each block. am i right ? x( please...

Homework Statement Body A weighs 100 N, and body B weighs 35 N. The coefficients of friction between A and the incline are μs = 0.56 and μk = 0.25. Angle θ is 40°. Let the positive direction of an x-axis be up the incline. Find acceleration along x. Homework Equations The...

I need some help with this problem. I can find the acceleration, just not the tension force. The mew kinetic is .6. The mass on the table is 10 kg and the mass hanging on the pulley is 20 kg. Thanks a ton.

Homework Statement Obtain the accelerations of mass a and mass b. Homework Equations Once i derive the displacement relation constraint, then i just have to diff twice w.r.t time. This part is ok. The Attempt at a Solution I am trying to reason this way: suppose 2M moves up by x...

Homework Statement What is the tension T? The pulley is massless and frictionless. m1=661 g, w2=5 N, g=9.8 m/s2 Picture attached Homework Equations T=w1+w2 ?? The Attempt at a Solution First of all, I converted 661 g into kg. Next I multiplied that by g. I added that value to...

The problem bellow is a real problem and I would like to get some ideas in order to overcome it. As you can see in the attached doc, we have two winches ( drum 1 and 2 ) on the same shaft of motor M1, two moving pulleys ( 3 and 4 ) and a fixed pulley (5). The load is 130 Tons, and we can...

The problem bellow is a real problem and I would like to get some ideas in order to overcome it. As you can see in the attached doc, we have two winches ( drum 1 and 2 ) on the same shaft of motor M1, two moving pulleys ( 3 and 4 ) and a fixed pulley (5). The load is 130 Tons, and we can...

As you can see in the attached doc, we have two winches on the same shaft of motor M1, two moving pulleys ( 3 and 4 ) and a fixed pulley (5). The load is 130 Tons, and we can measure that with a load cell at pulley 5 ( 32,5 Tons) when we stop the lifting of the load. But when the load is...

Homework Statement A pulley has a moment of inertia of 5.0 kg*m^2 and a radius of 0.5m. The cord supporting the masses m_1 and m_2 does not slip, and the axle is frictionless. Find the acceleration of each mass when m_1 = 2.0 kg and m_2 = 5.0 kg. Homework Equations F=ma, Fr=I(alpha)...

Homework Statement http://imageshack.us/m/135/2262/beltz.jpg I do no understand as shown in the above picture why T1 = 1 to make e^u0 = e^-u0, could anyone offer an explanation as to why this is the case? Thanks Homework Equations All above The Attempt at a Solution

Homework Statement Q2: IF mA=2kg, mB=7kg, and mC=5kg. Starting from rest, if a torque of 5Nm is given at t=0 to pulley A about point A for 3 seconds. Determine the angular velocity of the 3 pulleys at t=3s. [PLAIN]http://img98.imageshack.us/img98/8214/unled2tw.png Homework Equations...

Homework Statement The Attempt at a Solution I could say that (A)(B) are correct and (C) is wrong and i know 4kg block will have acceleration but i don't know how to find it.

Homework Statement Three guys hold up three boxes motionless on the pulley apparatus shown below. Guy 1 has a box with a mass of 40 kg, Guy 2 has a box with a mass of 100 kg, and Guy 3 has a box with an unknown mass. The boxes are, again, motionless. At some point they let go of them, but Guy 2...

Homework Statement Homework Equations Fnet=ma Fres=uFn Fg=mg The Attempt at a Solution ive been stuck on this for 2 days.. i tried splitting the problem into 2 weights and then considering the last mass but NOTHING. i tried SO MANY attempts NOTHING WORKS and its starting to make me angry...

Homework Statement The Attempt at a Solution Taking the pulley and strings, pan, ball, block as system ... momentum is conserved therefore in Y direction(vertical) ... -mv = -2mV + mV -mv = -mV v = V which is incorrect (as i expected as there has to be some loss of velocity...

Homework Statement Two rocks, with masses m1 and m2, are attached to the opposite ends of a rope that runs around the inner radius r of a pulley with moment of inertia I m1 = 10 kg m2 = 50kg I = 60 kg*m^2 r = 1 m I have to determine Tension for both masses and the angular...

1) What force does a spring scale measure? (I measured several different masses in different ways using pulleys and the spring scale always came up with the same number of Newtons, is this tension or what?) 2) Why, even when two different sized masses are hanged upon a pulley, the spring...

Homework Statement 1) What force does a spring scale measure? (I measured several different masses in different ways using pulleys and the spring scale always came up with the same number of Newtons, is this tension or what?) 2) Why, even when two different sized masses are hanged upon a...

b]1. Homework Statement [/b] There is a 1kg block on top of a 2 kg block. The 2 kg block A rope pulls on the lower block with a tension force of 20N. The coefficient of kinetic friction between the lower block and the surface is 0.16. The coefficient of kinetic friction between the lower...

Homework Statement The picture is located in the attachmentHomework Equations \sum t = 0 \sum Fx = 0 Although there are no horiz. forces in this problem \sum Fy = 0 The Attempt at a Solution I'm not sure how to start. On the top most pulley, I believe that there is a Tension T and a...

1. Two objects are connected via a pulley and some string. The 12 kg cart is on a frictionless 42 deg. incline while the 15kg block is on a horizontal surface having a coefficient of friction equal to 0.23. Determine the acceleration of the system of masses. 2. Fnet=ma 3. I first...

Questions about statics, mechanics, pulleys... 1) Does the radius of a single, fixated frictionless pulley affect the force I have to apply on one side in order to reach equilibrium with a constant load on the other? Or, will I always have to apply the same amount of force on the other side in...

Homework Statement In the given arrangement pulley P1 and P2 are moving with constant speed vo downward and the centre of the pulley P lies on the principal axis of a convex mirror having radius of curvature R. Find the speed of image of pulley P when it is at a distance x from the surface...

Homework Statement Not sure why, but I opened an old textbook (Dynamics - Engineering Mechanics, Meriam, 1980) and started paging through. I decided to try this problem (attached jpg) and got stuck. The problem asks for the acceleration of the center of mass of the system of 4 weights...

Homework Statement This is a six part conceptual question that is not difficult. However, the last part I am struggling with. What is wrong with the following student's reasoning: "The clockwise torque is greater than the counterclockwise torque because the disk is accelerating clockwise. For...

So up until now I have understood physics but we're on Pulleys now and the Free body diagrams are baffling me... My teacher just manages to pull formulae from his behinde and I can't seem to figure out how he derives them... like for acceleration of two objects suspended vertically from a pulley...

Hey guys, Is there a way to set up a pulley system that creates a mechanical disadvantage? My group and I are trying to produce a pulley system that, when a certain weight is attached, requires five times the amount of force to move the weight. I certainly know how to create a mechanical...

Homework Statement An Atwood machine is constructed using two wheels (with the masses concentrated at the rims). The left wheel (m1) has a mass of 2.1 kg and radius 21.44 cm. The right wheel (m2) has a mass of 2.8 kg and radius 33.94 cm. The hanging mass on the left (m3) is 1.53 kg and on...

hello guys..! i have one pulley of 8" (Driver) and another one 10" (Driven) he driver pulley is driven by 2Hp motor, so is there any equation or formula to calculate the Hp loss or power loss from 2Hp?

I was helping my friend with some questions regarding motions of pulleys and i am came up with the following question which i couldn't think of an argument... please check Two particles A and B of masses M and m respectively are connected by an inelastic string which passes over a smooth...

Homework Statement two blocks are arranged as shown in this diagram and held at rest -the table top is frictionless http://i55.tinypic.com/py894.jpg what would the accelerations be for each block when they are released?Homework Equations Fnet=maThe Attempt at a Solution edit: nvm, i solved...

Homework Statement Masses M1 and M2 are connected to a system of strings and pulleys as shown. The strings are massless and inextensible, and the pulleys are massless and frictionless. Find the acceleration of M1. http://img844.imageshack.us/img844/3758/cimg0572.jpg Homework Equations...

Homework Statement [PLAIN]https://wug-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/DuPage/phys2111/fall/homework/Ch-05-Newtons-Laws/blocks_on_pulleys/12.gif In the above picture, the masses are M1 = 10 kg, M2 = 15 kg, and M3 = 25 kg. The pulleys and strings are massless, there is...

Homework Statement The suspended 2.29 kg mass on the right is moving up, the 1.3 kg mass slides down the ramp, and the suspended 7.7 kg mass on the left is moving down. There is friction between the block and the ramp. The acceleration of gravity is 9.8 m/s2 . The pulleys are massless...

Figure 5-58 shows three blocks attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; the masses are mA = 4.40 kg, mB = 9.80 kg, and mC = 12.0 kg. When the blocks are released, what is the tension in the cord at the right? all i could do on this one is...

Homework Statement A person is pulling the cable with force T. Find T. http://img684.imageshack.us/img684/1959/drawing6pulleys.jpg Homework Equations Equilibrium Sum of forces y = 0 The Attempt at a Solution This is what I did...

Homework Statement A patient's leg is held in position by 2 weights tht are connected through cables. The weight of the leg is W = 300N. L is the horizontal distance between the points where the cables connect with the leg (points A and B) and C is the center of gravity for the leg, located...

Homework Statement The fig has three masses m1 , m2 , m3 .. all of which are unequal. Find relation between masses so that m3 remains stationary. ( pulleys , strings are frictionless and massless) The Attempt at a Solution I thought if mass on both side are equal then the system...

Homework Statement There are two objects attached by a pulled on a cline. please click the link to see the diagram. http://session.masteringphysics.com/problemAsset/1010976/24/MLD_2l_2_v2_2_a.jpg if m2 weighed 2 kg and m1 weight 6 kg, which direction does the static friction point for...

Hello guys! Another question appeared during the preparation for my exam . For some reason I don't feel 100% comfortable when dealing with systems including pulleys and masses. In the given exercise I'm supposed to calculate the kinetic energy T of the system (which ultimately leads to the...

Homework Statement In terms of m_1, m_2, and g , find the acceleration of the first block in the figure . There is no friction anywhere in the system. http://session.masteringphysics.com/problemAsset/1038627/5/YF-05-71.jpg Homework Equations The Attempt at a Solution I know...

Homework Statement A 5hp, 1755rpm, WEG Motor (part #00518OP3E184T) needs to turn another shaft that is 12" away at 1000rpm. Homework Equations Torque=HP*5252/RPM T=F*r -> F=T/r Drive Ratio = Driver Pitch Diameter/Driven Pitch Diameter Sum Forces Sum Moments The Attempt at a...

Homework Statement The pulley in the diagram has a radius of 0.160 m and a moment of inertia 0.480 kg.m². The rope does not slip on the pulley rim. Use energy methods to calculate the speed of the 4.00 kg block just before it strikes the floor. Homework Equations The Attempt at a...

Homework Statement An 80.0 kg student stands on a 20.0 kg platform and applies a steady downwards force of 300 N on a long rope; the rope extends up from the students hands passes over pulley#1 at the top and then under pulley #2; finally the rope is attached to the bottom of pulley #1, as...

A 1.2 kg mass and a 7.1 kg mass are connected by a massless string over a pulley that is in the shape of a bicycle wheel (all mass is concentrated at the rim) having a radius 0.25 m and mass 4.6 kg. Determine the time for the masses to move 2.6 m starting from rest. A. 2.714 sec B. 0.223...

Diagram Homework Statement Consider the two body system above. There is a 0.25kg object accelerating across a rough surface. The sliding object is attached by a string to a 0.1kg object which is suspended over a pulley. the coefficient of kinetic friction is 0.183. Calculate the...

Diagram Homework Statement Consider the two body system above. There is a 0.25kg object accelerating across a rough surface. The sliding object is attached by a string to a 0.1kg object which is suspended over a pulley. the coefficient of kinetic friction( arrow on diagram) is 0.183...