Questions
A body weight W newton at the surface of the earth. Its weight at a height equal to half the radius of the earth will be
detailed solution
Correct option is C
W=mg---(1) g'=GMR+h2=GMR+R22=gR23R22=gR29R24=49g ∴ W'=mg'=4mg9=4W9Talk 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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