Rotational MotionHard
Question
A wheel is rotating about an axis through its centre at 720 rpm. It is acted on by a constant torque opposing its motion for 8 second to bring it to rest finally. The value of torque in Nm is : - (given I = 
kg - m2)
kg - m2)Options
A.48
B.72
C.96
D.120
Solution
= 24π0 = 24π - α × 8 ⇒ α = 3π
τ = Iα =
× 3π = 72Create a free account to view solution
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