Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 4, Problem 28P
To determine
To Find: The tension in the rope at the given points.
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Two masses are hang over an ideal pulley using a rope. One mass is m1=120N and the other is m2=63N. Determine the tension of the rope when: (a) You hold m2 so that it won't mave: (b) You release m2 and m1 descends: (c) m1 lands and the two buckets come to rest.
Find the mass m of the counterweight needed to balance a truck with mass M = 1 300 kg truck on an incline of 0 = 45°. Assume both pulleys are frictionless and massless.
M
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A weight of 100 newtons is suspended by means of a string. It is then pulled aside by a horizontal force until the string makes an angle of 37o with the vertical. Find the tension in the string and the horizontal force for this equilibrium position.
Chapter 4 Solutions
Physics Fundamentals
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- If a force of 86N parallel to the surface of a 20° inclined plane will push a 120 -N block up the plane at constant speed, what force parallel to the plane will push it down at constant speed?arrow_forwardCan you please help me solve this by finding the tension assuming no friction?arrow_forward(ex) Two masses, pulley, incline with friction, static vs. kinetic friction: The two blocks shown below are connected by a light string over a massless frictionless pulley. The coefficient of static friction between each block and surface is 0.35, and the coefficient of kinetic friction is 0.20. The mass of block A is 10.0 kg, and the mass of block B is unknown. The angle of the incline is 30 degrees. Do everything in symbols first substitute numbers in only at the end. (See PSL 5.5,7,8,9) a) The blocks are released from rest, and they are on the verge of sliding, but they do not move. Draw FBDs for each block. b) In symbols, solve for the mass of block B. (What else could you solve for?) c) Substitute the numbers to determine the mass of block B. A 0 Barrow_forward
- If an object is on an inclined plane having an angle e, what is the component of weight (w) parallel to incline?arrow_forwardThe FedEx and UPS boxes have almost reached the top of the inclined plane they have been moving along and are now arrangedThe UPS box has a mass of 3.0 kg, and the FedEx box has a mass of 1.0 kg. The inclined plane is frictionless;however, the horizontal floor has coefficients of static and kinetic friction of 0.5 and 0.2. The pulley is frictionless, and the massesof the pulley and cord are negligible. Answer the following about this system. a.What is the size of the normal force on the UPS box?b. This system will begin to move if released from rest. However, if youpressed with a downward force on the FedEx box, this system could remain at rest.What size force is required? Your solution should include two free-body diagrams.c. If the system was set into motion down the ramp, without the forcementioned in the previous part, what would be the acceleration of the system? Yoursolution should include two free-body diagrams.arrow_forwardA horizontal force of 20 N is required to keep a 6.0 kg body in uniform motion along a horizontal surface. Find the coefficient ofarrow_forward
- Find the tension in each cord and the acceleration of the blocks. The coefficient of friction for all contact surfaces is 0.15 and the pulleys are frictionless. T 500N B 100N T1 250N 3arrow_forwardA car is traveling up a hill that is inclined at an angle θ above the horizontal. Determine the ratio of the magnitude of the normal force to the weight of the car when (a) θ = 16oand (b) θ = 38o.arrow_forwardFind the mass m of the counterweight needed to balance a truck with mass M = 1 360 kg truck on an incline of 0 = 45°. Assume both pulleys are frictionless and massless. +3r+| r M m iarrow_forward
- Find the tension in each cord and the acceleration of the blocks given that the coefficient of friction for all contact surface is 0.15 and the pulleys are friction less.arrow_forward*4-116. Replace the three forces acting on the shaft by a single resultant force. Specify where the force acts, measured from end B. A 5 ft 500 lb 5 4 3 3 ft -2 ft 200 lb 12 13 5 4 ft 260 lb Barrow_forwardIs it unreasonable to expect a coefficient of friction to exceed unity?arrow_forward
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