Asked by john
The angular speed of digital video discs (DVDs) varies with whether the inner or outer part of the disc is being read. (CDs function in the same way.) Over a 133 min playing time, the angular speed varies from 570 rpm to 1600 rpm. Assuming it to be constant, what is the angular acceleration (in rad/s2) of such a DVD?
Answers
Answered by
bobpursley
angular acceleration= (wf-wi)/timeinseconds
change rpm to rad/sec
570rpm*2PIrad/rev*1min/60sec.
change rpm to rad/sec
570rpm*2PIrad/rev*1min/60sec.
Answered by
john
so 570rpm*2pirad = 3581.415625
i divide that with rev*1min/60 sec == 59.69 is that correct ??
i divide that with rev*1min/60 sec == 59.69 is that correct ??
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