Asked by Anonymous
A record turntable rotating at 33 1/3 rev/min slows down and stops in 36s after the motor is turned off.
(a) Find its (constant) angular acceleration in revolutions per minute-squared.
(b) How many revolutions does it make in this time?
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I tried using a = w/t where
a = 0-33.3 / .6, but don't quite know where to go from there.
(a) Find its (constant) angular acceleration in revolutions per minute-squared.
(b) How many revolutions does it make in this time?
------------------------------
I tried using a = w/t where
a = 0-33.3 / .6, but don't quite know where to go from there.
Answers
Answered by
bobpursley
angAcc=changeinW/time
= (-33.3)/(36/60)
revolutions
D=avgvelocity*time=33.3/2 * (36/60)
= (-33.3)/(36/60)
revolutions
D=avgvelocity*time=33.3/2 * (36/60)
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