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A CD-Rom starts from rest and undergoes uniform angular acceleration until it reaches 26,000 rpm in 0.25 s. Through what angle does it rotate during this time?
13 years ago

Answers

Elena
f= 26,000 rpm=26000/3600=7.2 rev/s
2πf = εt
ε = 2πf/t =2π•7.2/0.25 =176 rad/s²

φ = εt²/2 = 176•(0.25)²/2 =5.5 rad
13 years ago

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