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Suppose the law of gravitational attraction suddenly changes and becomes an inverse cube law i.e. , but still remaining a central force. Then
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a
Kepler's law of areas still holds
b
Kepler's law of period still holds
c
Kepler's law of areas and period still hold
d
Neither the law of areas, nor the law of period still holds
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Correct option is D
F=GMmr3 mv2r=GMmr3 v=GMr2=GMr T=2πrV=2πrGMr=2πr2GM T2=4π2r4GM Both the kepler laws does not hold good
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