A simple pendulum of length L has been set up inside a railway wagon sliding down a frictionless inclined plane of inclination θ with the horizontal.What will be its period of oscillation as recorded by an observer inside the wagon
A
2π√Lgcosθ
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B
2π√Lg
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C
2π√Lgsinθ
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D
2π√Lcosθg
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Solution
The correct option is A2π√Lgcosθ when sliding an inclination geff=gcosθ Time period T=2π√Lgeff =2π√Lgcosθ