angular acceleration help?
2016-11-11 7:31 pm
During the course of a 2.3-hour movie, the angular speed of a DVD changes from 1550 rpm when reading the innermost data track to 688 rpm when it reaches the outermost track. What is the magnitude of the average angular acceleration during the movie?
回答 (3)
2016-11-11 7:44 pm
✔ 最佳答案
(change in angular velocity) / time
2016-11-11 7:40 pm
Why do you need to know that? Just enjoy the movie...
2016-11-11 8:06 pm
2.3 hours = 138 minutes
(688 - 1550) * 2*pi / 138 = ? rad/s^2
(688 - 1550) * 2*pi / 138 = ? rad/s^2
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161111113134AAebrWA