Physics, 13.11.2019 00:31 brittanyjacob8

Adj starts up her phonograph player. the turntable accelerates uniformly from rest, and takes t1 = 11.9 seconds to get up to its full speed of f1 = 78 revolutions per minute.

case 2: the dj then changes the speed of the turntable from f1 = 78 to f2 = 120 revolutions per minute. she notices that the turntable rotates exactly n2= 11 times while accelerating uniformly.

t1 = 11.9 seconds
n2 = 11 times

part (a) calculate the angular speed of the turntable while it is turning at f1 = 78 in radians/second in case 1.

part (b) how many revolutions does the turntable make while accelerating in case 1?
part (c) calculate the magnitude of the angular acceleration of the turntable in case 1, in radians/second2.
part (d) calculate the magnitude of the angular acceleration of the turntable (in radians/second2) while increasing to 120 rpm (case 2).
part (e) how long (in seconds) does it take for the turntable to go from f1 = 78 to f2 = 120 rpm?

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Adj starts up her phonograph player. the turntable accelerates uniformly from rest, and takes t1 = 1...

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