Questions
Densities of two planets are in the ratio 1 : 2 and their radii are in the ratio 3 : 1. Then the ratio of time periods of a simple pendulum of their surfaces are in the ratio.
a
6 : 1
b
1 : 6
c
2 : 3
d
2 : 3
detailed solution
Correct option is C
(3)g=GMR2=G. 43 πR3ρR2 = 43 πGρR ⇒ g ∝ ρRT=2π lg ⇒ T ∝ 1g ⇒ T ∝ 1ρR∴ T1T2= ρ2ρ1 R2R1= 2. 13 = 23Talk to our academic expert!
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