When turning on a motor, it reaches a nominal speed of 2,500 rpm in a time of 12 s; when the motor is turned off it takes 42 s to come to a complete stop. If we start from the angular motion is uniformly accelerated, determine the number of revolutions that performs the motor to reach the rated speed and then to stop.

College Physics
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ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter24: Electromagnetic Waves
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When turning on a motor, it reaches a nominal speed of 2,500 rpm in a time of 12 s; when the motor is turned off it takes 42 s to come to a complete stop. If we start from the angular motion is uniformly accelerated, determine the number of revolutions that performs the motor to reach the rated speed and then to stop.

 

a) 01 = 250 rev., 02 = 875 rev.
b) Ө, 3D 150 rev., Ө, —D 719 rev.
с) Ө, %3D 250 rev., 0, 3D 719 rev.
ө, 3 719 rev.
d) Ө, %3 150 rev., 0z 3D 875 rev.
Transcribed Image Text:a) 01 = 250 rev., 02 = 875 rev. b) Ө, 3D 150 rev., Ө, —D 719 rev. с) Ө, %3D 250 rev., 0, 3D 719 rev. ө, 3 719 rev. d) Ө, %3 150 rev., 0z 3D 875 rev.
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