1.

A 40 kg flywheel in the form of a uniform circular disc 1 m radius is making 120 rpm. Calculate the angularmomentum[251.2 Kgm%)

Answer»

Mass, m = 40kg

Radius, r = 1m

Angular velocity is, w = 120 rev/min = (120)(2π)/60 rad/s= 4π rad/s

MI of the ring is, I = mr²/2= (40)(1)2kg m2= 40 kg m2

Now, Angular momentum, L = Iw = (40)(4π) = 251.2 kg m2s-1

can you plss explain 2nd step where I=mr2/2

moment of inertia of a disc=mr²/2

then it will be 40×(1)2/2=20



Discussion

No Comment Found

Related InterviewSolutions