The elevator in the new building (represented by E in the figure) has a weight of WE = 4500 lb when fully loaded and is connected as shown to a W of weight of Ww = 900 lb. The motor has an efficiency of counterweight n = 80%. Determine: (a) The required electrical power in hp delivered by the motor when the elevator is moving down at a constant speed of 2.5 ft/s. (b) The required electrical power when it has an upward velocity of 2.5 ft/s and a deceleration of 0.5 ft/s². E W M
The elevator in the new building (represented by E in the figure) has a weight of WE = 4500 lb when fully loaded and is connected as shown to a W of weight of Ww = 900 lb. The motor has an efficiency of counterweight n = 80%. Determine: (a) The required electrical power in hp delivered by the motor when the elevator is moving down at a constant speed of 2.5 ft/s. (b) The required electrical power when it has an upward velocity of 2.5 ft/s and a deceleration of 0.5 ft/s². E W M
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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Question
![The elevator in the new
building (represented by E in the figure) has a
weight of WE = 4500 lb when fully loaded and is connected as shown to a
W of weight of Ww = 900 lb. The motor has an efficiency of
counterweight
n = 80%.
Determine:
(a) The required electrical power in hp delivered by the motor when the
elevator is moving down at a constant speed of 2.5 ft/s.
(b) The required electrical power when it has an upward velocity of
2.5 ft/s and a deceleration of 0.5 ft/s².
E
W
M](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fd7b1f94a-aeb1-4e21-a353-b14674dcbf02%2Fa180df3e-0e81-48ca-a8e3-eb6b578e93fb%2Fmopwaj_processed.png&w=3840&q=75)
Transcribed Image Text:The elevator in the new
building (represented by E in the figure) has a
weight of WE = 4500 lb when fully loaded and is connected as shown to a
W of weight of Ww = 900 lb. The motor has an efficiency of
counterweight
n = 80%.
Determine:
(a) The required electrical power in hp delivered by the motor when the
elevator is moving down at a constant speed of 2.5 ft/s.
(b) The required electrical power when it has an upward velocity of
2.5 ft/s and a deceleration of 0.5 ft/s².
E
W
M
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