gravitation

JEE Mains 2015 Preparation › Mechanics questions › gravitation

The mass and radius of a planet are twice that of the earth Then the period of oscillation of a seconds pendulum on that planet will be ans given is âˆš2 sec But i think the ans should be 2 sec only Because it is the only time period of seconds pendulum

#Physics #Mechanics

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2 Answers

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Anirudh Narayanan ·2009-02-25 17:57:26

Time period of a pendulum = (something)âˆšl/g

g = GM/R²

R' = 2R and M' = 2M

Hence, g' = g/2 => T' = âˆš2T = âˆš2 seconds.......

Anything wrong in this solution?

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karan9989 gupta ·2009-02-26 18:23:23

you haven't put the value of T according to your equation ans should be 2âˆš2 sec

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