An object of mass 100 kg taken to a planet whose mass is double to earth and radius is half of earth then find the weight of that object on that planet.
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Gravitation
Variation in Value of Acceleration due to Gravity
What is the weight of a 70 ...
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Asked on December 27, 2019 by
Prabh Chouhan
What is the weight of a 70 kg body on the surface of a planet whose mass is
7
1
th that of earth and radius is half of earth?
A
20 kg
B
40 kg
C
70 kg
D
140 kg
MEDIUM
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
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