The length of second pendulum is 1 m on earth. If mass and diameter of the planet is double than that of earth, then length becomes
Options
(a) 1 m
(b) 2 m
(c) 0.5 m
(d) 4 m
Correct Answer:
0.5 m
Explanation:
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Ans (c) 0.5
T R l
GM = 2
2
π = 2 s
R l
GM
R l
G M
l
2 2 4
2 = ′ ′ = ( )
⇒ 0.5 m