Problems 4.78 through 4.80 The crates A and B of weight WA by a pulley system. The system is released from rest and friction between A and the horizontal surface is insufficient to prevent slipping. The cables in the pulley system are inextensible, and the coefficient of kinetic friction between the crate A and the horizontal = 50 lb and WR = 75 lb, respectively, are connected surface is Problem 4.78 If u = 0, determine the speed of B after A slides 10 ft. Problem 4.79 Determine the required value of u so that the speed of B is 27 ft/s after it drops 15 ft. Figure P4.78-P4.80 Problem 4.80 If u = 0.25, determine the speed of A after B drops 15 ft.
Problems 4.78 through 4.80 The crates A and B of weight WA by a pulley system. The system is released from rest and friction between A and the horizontal surface is insufficient to prevent slipping. The cables in the pulley system are inextensible, and the coefficient of kinetic friction between the crate A and the horizontal = 50 lb and WR = 75 lb, respectively, are connected surface is Problem 4.78 If u = 0, determine the speed of B after A slides 10 ft. Problem 4.79 Determine the required value of u so that the speed of B is 27 ft/s after it drops 15 ft. Figure P4.78-P4.80 Problem 4.80 If u = 0.25, determine the speed of A after B drops 15 ft.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Only need problem 80
![Section 4.3
Work-Energy Principle for Systems of Particles
293
Problems 4.78 through 4.80
The crates A and B of weight W = 50 lb and WB
by a pulley system. The system is released from rest and friction between A and the
horizontal surface is insufficient to prevent slipping. The cables in the pulley system are
inextensible, and the coefficient of kinetic friction between the crate A and the horizontal
surface is k-
75 lb, respectively, are connected
14k
Problem 4.78 If u =
= 0, determine the speed ofB after A slides 10 ft.
B
Problem 4.79 Determine the required value of uk so that the speed of B is 27 ft/s
after it drops 15 ft.
Figure P4.78-P4.80
Problem 4.80 If u = 0.25, determine the speed of A after B drops 15 ft.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F069ddad5-8b6b-4dd2-9514-97e5e65a6683%2F503737c6-b96d-4257-a6e7-2f1a62382284%2Fuop2snb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Section 4.3
Work-Energy Principle for Systems of Particles
293
Problems 4.78 through 4.80
The crates A and B of weight W = 50 lb and WB
by a pulley system. The system is released from rest and friction between A and the
horizontal surface is insufficient to prevent slipping. The cables in the pulley system are
inextensible, and the coefficient of kinetic friction between the crate A and the horizontal
surface is k-
75 lb, respectively, are connected
14k
Problem 4.78 If u =
= 0, determine the speed ofB after A slides 10 ft.
B
Problem 4.79 Determine the required value of uk so that the speed of B is 27 ft/s
after it drops 15 ft.
Figure P4.78-P4.80
Problem 4.80 If u = 0.25, determine the speed of A after B drops 15 ft.
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