Q.

If a graph is plotted between T2 and r3 for a planet then, its slope will be

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a

4π2GM

b

GM4π2

c

4πGM

d

Zero

answer is A.

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Detailed Solution

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Time period of the planet,

T=2πrv=2πrGMr=2πrrGM

T2=4π2r3GM=4π2GMr3

Slope of T2 vs r3 graph:

m=T2r3=4π2GM

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