a planet has mass twice that of earth and radius thrice that of earth.If an object weight 900N on earth then it's weight on the planet will be
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Weight of object on earth W=R2GMm
Now, M=ρV =34πρR3
∴W=3R2GρπR3Gm=34πρRGm
WEWP=(ρEρP)(RERP)
=31×41 = 121
WP=12900=75N
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