1.

If the time period of revolution of a planet is increased to 3from what percentage its radius of the or6.resent value. Thento 3/3 times its pbit of revolution will increases?

Answer»

as we know the third kepler’s law of planetry motion that is T²=k R³

so according to that

T²= K *R² => T²/R³ = k .........(1)now new T = 3√3T

{3√3T}²/R'³= k.........(2)

so, equating both

R'³ = R³*(3√3T)²/T²

=> R'³ = 27R³=> R' = 3R

so, R should be increased by (3R-R)*100/R = 200%



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