A partivle weighs 120N on the surface of the earth. At what height above the earth's surface will its weight be 30N? RADIUS OF EARTH=6400km.
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A particle of weight 120N on the surface of Earth.
F=mg=120N=GM/r²
weight of particle above the height (h)= 30N
F1=30N=GM/(r+h)²
F1/F=r²/(r+h)²
30/120=r²/(r+h)²
1/2=r/r+h
r+h=2r
h=r=6400km
F=mg=120N=GM/r²
weight of particle above the height (h)= 30N
F1=30N=GM/(r+h)²
F1/F=r²/(r+h)²
30/120=r²/(r+h)²
1/2=r/r+h
r+h=2r
h=r=6400km
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