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A cube of side x is moving with velocity u on a horizontal smooth plane. There is a ridge at O.
find angular speed of the cube after it hits O
 one year ago
 one year ago
A cube of side x is moving with velocity u on a horizontal smooth plane. There is a ridge at O. find angular speed of the cube after it hits O
 one year ago
 one year ago

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shubhamsrgBest ResponseYou've already chosen the best response.0
dw:1357204606212:dw
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
i know angular momentum will be conserved here but unable to apply it..
 one year ago

DiwakarBest ResponseYou've already chosen the best response.0
Apply the conservation of energy. Mu^2/2=Iw^2/2 where I is the moment of inertia about the vertical edge about which it will rotate.
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
so, mu^2 = 2/3 (mx^2) * w^2 w^2 = 3u^2 /2x^2 nopes , not the right ans why you used cons of energy ?
 one year ago

DiwakarBest ResponseYou've already chosen the best response.0
Are you sure you are getting the I right?
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
2/3 mx^2 ..i googled it! though i can derive that also..
 one year ago

DiwakarBest ResponseYou've already chosen the best response.0
what is the correct answer? I will try to solve it at some other time?
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
though that was an option which came by this method, correct ans is 3u/2x
 one year ago

DiwakarBest ResponseYou've already chosen the best response.0
@yrelhan4 Did you use Mux/2=Iw
 one year ago

yrelhan4Best ResponseYou've already chosen the best response.1
yup.. I would be icm + ma^2/2
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.1
Use conservation of angular momentum, not of kinetic energy.
 one year ago

VincentLyon.FrBest ResponseYou've already chosen the best response.1
Moment of inertia about edge is correct.
 one year ago

shubhamsrgBest ResponseYou've already chosen the best response.0
ohh yes,,3u/4x..got it,,was easy..hmm
 one year ago
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