1.

A plumb line is suspended from a ceiling of a car moving with horizontal acceleration of a. What will be the angle of inclination with vertical                                [Orissa JEE 2003]

A.           \[{{\tan }^{-1}}(a/g)\]       
B.             \[{{\tan }^{-1}}(g/a)\]
C.             \[{{\cos }^{-1}}(a/g)\]
D.               \[{{\cos }^{-1}}(g/a)\]
Answer» B.             \[{{\tan }^{-1}}(g/a)\]


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