3- A pulley is accelerated uniformly from rest at a rate of 8 rad/s². After 20 s the acceleration stops and the pulley runs at constant speed for 2 min, and then the pulley comes uniformly to rest after a further 40 s. Calculate: (a) the angular velocity after the period of acceleration (b) the deceleration (c) the total number of revolutions made by the pulley.

3- A pulley is accelerated uniformly from rest at a rate of 8 rad/s². After 20 s the acceleration stops and the pulley runs at constant speed for 2 min, and then the pulley comes uniformly to rest after a further 40 s. Calculate: (a) the angular velocity after the period of acceleration (b) the deceleration (c) the total number of revolutions made by the pulley.

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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3- A pulley is accelerated uniformly from rest at a rate of 8 rad/s². After 20 s the acceleration
stops and the pulley runs at constant speed for 2 min, and then the pulley comes uniformly to
rest after a further 40 s. Calculate:
(a) the angular velocity after the period of acceleration
(b) the deceleration
(c) the total number of revolutions made by the pulley.

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