Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 4, Problem 45P
To determine
To Find: The force that must be exerted on the rope.
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Students have asked these similar questions
*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
B
LIJ
100 N
400 N
200 N
4 m
4 m
600 N
Fig. 2-18
1.
Reduce the system of forces acting on the beam
shown in Fig. 2-18 into a force at A and a couple.
A box weighing 66.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end (Fig. 4-37). Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley weighs (a) 30.0 N, (b) 60.0 N, and (c) 90.0 N.
Chapter 4 Solutions
Physics Fundamentals
Ch. 4 - Prob. 1QCh. 4 - Prob. 2QCh. 4 - Prob. 3QCh. 4 - Prob. 4QCh. 4 - Prob. 5QCh. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - Prob. 8QCh. 4 - Prob. 9QCh. 4 - Prob. 10Q
Ch. 4 - Prob. 11QCh. 4 - Prob. 12QCh. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - Prob. 15QCh. 4 - Prob. 16QCh. 4 - Prob. 1PCh. 4 - Prob. 2PCh. 4 - Prob. 3PCh. 4 - Prob. 4PCh. 4 - Prob. 5PCh. 4 - Prob. 6PCh. 4 - Prob. 7PCh. 4 - Prob. 8PCh. 4 - Prob. 9PCh. 4 - Prob. 10PCh. 4 - Prob. 11PCh. 4 - Prob. 12PCh. 4 - Prob. 13PCh. 4 - Prob. 14PCh. 4 - Prob. 15PCh. 4 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - Prob. 18PCh. 4 - Prob. 19PCh. 4 - Prob. 20PCh. 4 - Prob. 21PCh. 4 - Prob. 22PCh. 4 - Prob. 23PCh. 4 - Prob. 24PCh. 4 - Prob. 25PCh. 4 - Prob. 26PCh. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - Prob. 29PCh. 4 - Prob. 30PCh. 4 - Prob. 31PCh. 4 - Prob. 32PCh. 4 - Prob. 33PCh. 4 - Prob. 34PCh. 4 - Prob. 35PCh. 4 - Prob. 36PCh. 4 - Prob. 37PCh. 4 - Prob. 38PCh. 4 - Prob. 39PCh. 4 - Prob. 40PCh. 4 - Prob. 41PCh. 4 - Prob. 42PCh. 4 - Prob. 43PCh. 4 - Prob. 44PCh. 4 - Prob. 45PCh. 4 - Prob. 46PCh. 4 - Prob. 47PCh. 4 - Prob. 48PCh. 4 - Prob. 49PCh. 4 - Prob. 50PCh. 4 - Prob. 51PCh. 4 - Prob. 52PCh. 4 - Prob. 53PCh. 4 - Prob. 54PCh. 4 - Prob. 55PCh. 4 - Prob. 56P
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- (a) What minimum force F is needed to lift the piano (mass M) using the pulley apparatus shown in Fig. 4–66? (b) Determine the tension in each section of rope: Fr1, Fr2, Fr3, and Fr4. Assume pulleys are massless and frictionless, and that ropes are massless. FT3 F72 FTI FT4 F FIGURE 4-66 Problem 76. सarrow_forward2-49. If F1 300 N and 0 = 10°, determine the magnitude and direction, measured counterclockwise from the positive x' axis, of the resultant force acting on the bracket. y F2= 200 N F3 = 180 N 60° F1 13 12arrow_forward3-39. A "scale" is constructed with a 4-ft-long cord and the 10-lb block D. The cord is fixed to a pin at A and passes over two small pulleys. Determine the weight of the suspended block B if the system is in equilibrium when s=1.5 ftarrow_forward
- 8–26. The refrigerator has a weight of 180 lb and rests on a tile floor for which u, = 0.25. If the man pushes horizontally on the refrigerator in the direction shown, determine the smallest magnitude of horizontal force needed to move it. Also, if the man has a weight of 150 lb, determine the smallest coefficient of friction between his shoes and the floor so that he does not slip. 4/8 -15 f- 3 ftarrow_forwardA stone hangs by a fine thread from the ceiling, and a section of the same thread dangles from the bottom of the stone (Fig. 4–36). If a person gives a sharp pull on the dangling thread, where is the thread likely to break: below the stone or above it? What if the person gives a slow and steady pull? Explain your answers. FIGURE 4-36 Question 9.arrow_forward3-9. Determine the maximum force F that can be supported in the position shown if each chain can support a maximum tension of 600 lb before it fails. B, 30° Farrow_forward
- (III) Suppose the pulley in Fig. 4–55 is suspended by a cord C. Determine the tension in this cord after the masses are released and before one hits the ground. Ignore the mass of the pulley and cords. 1.2 kg 3.2 kg FIGURE 4-55 Problem 35.arrow_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_forward18E. (a) An 11.0 kg salami is supported by a cord that runs to a spring scale, which is supported by another cord from the ceiling (Fig. 5-43a). What is the reading on the scale? (b) In Fig. 5-43b the salami is supported by a cord that runs around a pulley and to a scale. The opposite end of the scale is attached by a cord to a wall. What is the reading on the scale? (c) In Fig. 5-43c the wall has been replaced with a second 1.0 kg salami on the left, and the assembly is stationary, What is the reading on the scale now? Spring scale Spring scale 11 kg (b) Spring scale I1 kg (a) 11 kg 11 kg (6)arrow_forward
- (I) A box weighing 77.0 N rests on a table. A rope tied to the box runs vertically upward over a pulley and a weight is hung from the other end (Fig. 4–45). Determine the force that the table exerts on the box if the weight hanging on the other side of the pulley weighs (a) 30.0 N, (b) 60.0 N, and (c) 90.0 N. FIGURE 4-45 Problem 20.arrow_forwardCan a body be in equilibrium , even if only one external force acts on it? Explain.arrow_forwardA student hangs three masses from a force table. If the first mass of 172g is at an angle of 184 degrees, and she then hangs a mass of 248g at 259 degrees, calculate the mass and angle of the third mass so that ring on the force table is in equilibrium. Assume the given masses include the mass of the hangers.arrow_forward
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