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An open vessel containing water is given...

An open vessel containing water is given a constant acceleration in the horizontal direction. Then the free surface of water gets sloped with the horizontal at an angle `theta`, given by

A

(A) `theta=cos^-1(g/a)`

B

(B) `theta=tan^-1(a/g)`

C

(C) `theta=sin^-1(a/g)`

D

(D) `theta=tan^-1(g/a)`

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The correct Answer is:
D
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