A man in a coal mine experience that the weight of his body reduced from 800N to 777N calculate the depth at which he was at that time radius of earth was 6400km
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rupshreebohra
Secondary School Physics 32+16 pts
Find the weight of an object at a height of 6400 km above the
earth’s surface. The weight of the object
at
the surface of the earth is 20 N and the radius of the earth is 6,400 km.
Plz answr this fast i need the answer to this question today itself.....plz fast....
Report by Shaggyy 28.09.2014
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shivam2000
Shivam2000Ace
F = GMm
R²
M is the mass of the Earth m is the mass of the object
R is the radius of the earth =6400km(given)
When object is kept on surface.
W=F=GMm= 20 N
R²
When object is lifted to a certain height=R' = R+h = 2R
h = R = 6400 km
Now we have weight of the object is
W' = F' = GMm
(2R)²
W' = (1/4).(GMm)
R²
=W
4
Now the weight of the object will be
weight=20
4
W=5N