Question

a turntable rotates at 150rev/min calculate angular speed in rad/sec and degree/sec what is angular displacement after 25sec if turntable slows down to 90rpm after 2min find angular acceleration

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Answer 1

Answer:

Explanation

angular acceleration = 60/2 = 30 rev/min^2

s=150(25/60)+1/2(-30)(25/60)^2

s=125/2 -1/2(1)(625/120)

s=125/2 - 625/240

s=125*120 / 240 - 625/240

s=15000-625 / 240

s=13075 / 240

s=54.47 rev