An astronaut on planet X
An astronaut lands on planet X which has
the mass and
the radius of Earth. On Earth the astronaut weighed
. How much does he weigh on planet X?
The answer is 1200.
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1 solution
first of all F=GMm/(r r) . Here F=900 and M=mass of earth; m=mass of astrounaut. on the other planet he will feel force f = [G (3M/4) m] divided by [(3r/4) (3r/4)] later is just an easy part