A turntable is rotating at 33 1/3 rpm. You then flip a switch, and the turntable
ID: 2092377 • Letter: A
Question
A turntable is rotating at 33 1/3 rpm. You then flip a switch, and the turntable speeds up, with constant angular acceleration, until it reaches 78 {rpm}. You are now given an additional piece of information: It takes five complete revolutions for the turntable to speed up from 33 1/3 {rpm} to 45 {rpm}. Which of the following equations could you use to directly solve for the numerical value of the angular acceleration alpha?
FROM THE ANGULAR EQUATION WHICH ONE WILL BE THE ANSWER 1,3 OR OMEGA SQUARE=OMEGA SQUARE INITIAL+2a(final angle- intial angle)
Explanation / Answer
the fourth equation an be used directly.
you know both the omegas. and theta is given 5 complete revolutions =2 pi *5
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