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Questions  

A plumb line is suspended from the ceiling of a car moving with horizontal acceleration of a. What will be the angle of inclination with vertical?

a
tan−1⁡(a/g)
b
tan−1⁡(g/a)
c
cos−1⁡(a/g)
d
cos−1⁡(g/a)

detailed solution

Correct option is A

From △OAB, we havetan⁡θ=a/gθ=tan−1⁡(a/g)

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