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krishna teja Grade:
        A solid body starts roting about a stationary axis with an angular velocity=t/50,t is in sec

how soon after the beginning of rotation will the total acceleration vector of an arbitrary point of the body form an an angle 60degrees with its velocity vector?
6 years ago

Answers : (1)

vikas askiitian expert
510 Points
										

v=t/50  ( given)


dv/dt = at(tangential)=1/50


ar(centripital)=v^2/r = (t^2/2500r)


total accleration = sqrt ( (at)^2 + (ar)^2 )


 total accleration is making an angle 60 with velocity vector ......velocity is parallel to tangential accleration so total accleration makes angle of 60 with tangential accleration...


a(total accleration)cos60 = a(tangential)             


t= sqrt(3r) sec        ( here r is the radius of circular path)

6 years ago
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