a body of mass 20 kg is placed on the surface of an imaginary planet whose mass is 2 times and radius 3 times that of the earth. calculate the weight of the body on this planet.
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Answer:
g
e
=
R
2
GM
(Gravitational acceleration of earth)
g
′
=
7R
2
GM
×4 (Gravitational acceleration of planet)
Weight on that planet W
′
=mg
′
=m×
7R
2
4GM
=
7
4
×
R
2
GMm
=
7
4
×mg=
7
4
W
=
7
4
×70=40kg
Explanation:
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