sphere of mass 132kg is attracted by a second sphere of mass 30kg when their centres are 30cm apart, with a force of 0.3 milligram weight. Calculate the value of gravitational constant.
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Answer:
Distance (G)=20cm=0.2m
Mass (M 1 )=40kg Mass (m 2 )=15kg
Force (F)=0.1 milligram wt
=0.1×10 ^-3 ×980 dyne
=98×10^-3 dyne
=98×10^-8 N
=9.8×10^-9 N
F= GM1M2 / R^2
G= Fk^2/ M1M2 = 9.8×10^−7×0.2×0.2
---------------------------
40×15
G =6.5×10^-11 m^2
Explanation:
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