33. A flywheel rolls down on an inclined plane. At any instant of time, the ration of rotational kinetic energy to total kinetic energy is a)1 : 2 b)3 : 1 c)4 : 3 d)1 : 3
Suraj Kumar Nayak , 8 Years ago
Grade 12th pass
1 Answers
Jayant
Last Activity: 4 Years ago
By assuming that wheel is disc
KEr= Iw2/2
Total KE = mv2/2 +Iw2/2
Moment of inertia of disc = MR2/2
And w = v /r
By putting value of moment of inertia I and Angular velocity w we get
KEr =mv2/4
T KE = mv2/2 + mv2/4 = 3mv2/4
Ratio = 1:3
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