pulley

  1. B

    Stuck on Pulley system

    I am working on a pulley system in equilibrium and need to come up with EFx=0 and EFy=0. But because we have not done pulleys I have no clue where to begin or how to put it in a free body diagram. Attached file problem 4-39 with the 2000lb. I have to find BC and BD loads in the members. I...
  2. R

    A 15 kg block with a pulley attached slides along a frictionless surface.

    I already did part 1: 11cm/2 = 5.5 cm I need help on part 2 and 3. Any help is appreciated!! (Nerd)
  3. D

    Acceleration on a pulley.. please check it out!

    A wooden block with mass 0.34 kg rests on a horizontal table, connected to a string that hangs vertically over a friction-less pulley on the table's edge. From the other end of the string hangs a 0.10 kg mass. a) What minimum coefficient of static friction between the block and table will...
  4. A

    Help with pulley concept

    You have box A being suspended over a pulley system and on the other side you have box B. box B is released and accelerates downward a distance of d. What I want to know is are the accelerations on box A and B equal in magnitude and opposite in direction? Because that would make sense to me...
  5. V

    Tangential Force to pull a cylindrical plastic cover

    I would like to know views on the tangential force required to pull a cylindrical cover. Moreover, we can place pulleys at the end to pull the cover horizontally. This is a practical problem in which the diameter of the cylinder changes each time the cover is pulled to the right. PART-I A...
  6. G

    Three masses suspended on pulley

    A pulley is massless and frictionless. 3 kg, 2 kg, and 6 kg masses are suspended on a pulley. (a)What is the tension T1 in the string between the two blocks on the left-hand side of the pulley? (b)What is the magnitude of the acceleration of the lower left-hand block? I solved for...
  7. Quacky

    [SOLVED] Simple Pulley Mechanics

    a) Two particles P & Q of masses 3kg and 6kg respectively are attached to the ends of a light inextensible string. The string passes over a smooth fixed pulley. The system is released from rest with both masses 2m above a horizontal floor. Find how long it takes for Q to hit the floor. Assuming...
  8. J

    Maximum force with friction

    Hi, spent several hours on this already :/ THE QUESTION: A block of mass M = 9.9 kg rests on a bracket of mass m = 5.6 kg, as shown in the figure below. The bracket sits on a frictionless surface. The coefficients of friction between the block and the bracket on which it rests are μs =...
  9. E

    MCAT Physics Math - Pulley System

    Please view attached file that shows part of the book’s calculation to pulley system question. I understand all the physics theory behind the question and answer, but I am lost on the math. 1) I would like to know what is the name of the math theory where you can just add two different physics...
  10. R

    Pulley: acceleration

    In the figure below, there is no friction in the pulley and under blocks A and B. When the system is released from rest, what is the constant acceleration of the system? Help please, the answer is 8, but I can't figure out how to do it. Thank you to those who will help. God bless. :) block A...
  11. F

    Dynamics Pulley System Question

    Hi, i've got a question here that im not really sure if im doing it write. its in the attachment provided question 6b Password is exam this is what ive done. The 5 kg mass shown is released. u = 0.7 between the 2 kg mass and the slope of 30degrees, and there is no friction in the pulley. How...
  12. D

    Lifting Yourself With a Pulley

    I'm having trouble explaining in forces why my intuitive answer is correct. The problem is a rope through a single pulley attached to the ceiling. A person sits in a chair (system mass M) which is attached to one end of the rope, and pulls down on the other rope to lift himself. I need to...
  13. I

    Pulley, spring and a mass on an inclined plane

    Ok, this problem is giving some of my classmates trouble: A pulley has a radius R and moment of inertia I. One end of the mass m is connected to a spring of force constant k, and the other end is fastened to a cord wrapped around the pulley. They pulley axle and incline are frictionless. If...
  14. H

    Sliding Blocks on frictional surface with a pulley that has mass

    In the system shown below, there is a block of mass M = 4.3 kg resting on a horizontal ledge. The coefficient of kinetic friction between the ledge and the block is 0.25. The block is attached to a string that passes over a pulley, and the other end of the string is attached to a hanging block...
  15. R

    Pulley Problem

    In the arrangement shown in Figure P14.40, an object of mass, m = 6.0 kg, hangs from a cord around a light pulley. The length of the cord between point P and the pulley is L = 2.0 m. (a) When the vibrator is set to a frequency of 155 Hz, a standing wave with six loops is formed. What must be...
  16. H

    [SOLVED] Monkey, bananas and pulley

    Hi, So I've been trying to understand this classical problem with the monkey of equal mass as a bunch of bananas suspended in the two extremities of an ideal rope, joined by a frictionless and massless pulley. What I know is that T - mg = ma for both the monkey and the bananas, and that...
  17. B

    two blocks on a pulley, find tension and acceleration

    In the drawing, the weight of the block on the table is 422 N and that of the hanging block is 185 N. Ignoring all frictional effects and assuming the pulley to be massless, find (a) the acceleration of the two blocks and (b) the tension in the cord. (in the diagram there is a block on a table...
  18. R

    Pulley Problem

    The pulley in Figure P8.59 has a moment of inertia of 6.0 kg·m2 and a radius of 0.50 m. The cord supporting the masses m1 and m2 does not slip, and the axle is frictionless. (a) Find the acceleration of each mass when m1 = 2.4 kg and m2 = 5.1 kg. (b) Find the tension in the cable supporting m1...
  19. C

    acceleration pulley problem!

    A 30.7- kg block (m1) is on a horizontal surface, connected to a 6.7- kg block (m2) by a massless string as shown in the Figure. The pulley is massless and frictionless. A force of 212.9 N acts on m1 at an angle of 33.7°. The coefficient of kinetic friction between m1 and the surface is 0.189...
  20. L

    Pulley Tension Problem

    Ok, so I have two boxes: one on a table, and one hanging off the table. The two are connected by a rope and a pulley. The box on the table has a mass of 30kg. The box hanging off the table has a mass of 15kg. The friction force between the box and the table is 10N. I'm asked to find...