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A plumb bob is hung from the ceilling of...

A plumb bob is hung from the ceilling of a train compartment. The train moves on an inclined track of inclination `30^(@)` with horizontal. Acceleration of train up the plane is `a=g//2` . The angle which the string supporting the bob makes with normal to the ceilling in reqilibrium is.

A

`30^(@)`

B

`tan^(-1) ((2)/(sqrt(3)))`

C

`tan^(-1)((sqrt(3))/(2))`

D

`tan^(-1) (2)`

Text Solution

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The correct Answer is:
B
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