1.

A simple pendulum is suspended from the roof of a train. If the train is moving with an acceleration `49 cm//s^(2)`. Then the angle of inclination of the string about the vertical will beA. `20^(@)`B. zeroC. `30^(@)`D. `3^(@)`

Answer» Correct Answer - D
`F=mgsintheta`
`a=gsintheta`
`therefore (49)/(980)=sintheta`
`therefore theta=3^(@)`


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