Question
Tue August 19, 2008 By:

r cube is directly propotional to t square how? and why?

Expert Reply
Tue August 19, 2008

Considering a satelite in a circular orbit,centripetal acceleration=GM/r2 =v2 /r

v=(GM/r)0.5

Using,t=2(pie)r/v

t=k(r)3/2 ,k being constant

hence

t2 =k r3 ,Hence ris directly proprtional to t2

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