Questions
Acceleration due to gravity on moon is 1/6 of the acceleration due to gravity on earth. If the ratio of densities pf earth and moon is then radius of moon Rm in terms of Re will be
detailed solution
Correct option is A
Acceleration due to gravityg=43πρGR ∴g∝ρRor gmge=ρmρe⋅RmRe As gmge=16 and ρeρm=53 given ∴RmRe=gmgeρeρm=16×53 ∴ Rm=518ReTalk to our academic expert!
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A uniform ring of mass M and radius r is placed directly above a uniform sphere of mass 8 M and of same radius R. The centre of the ring is at a distance of d = R from the centre of the sphere. The gravitational attraction between the sphere and the ring is
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