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A car is moving on a plane inclined at 3...

A car is moving on a plane inclined at `30^(@)` to the horizontal with an acceleration of `10m//s^(2)` parallel to the plane upward. A bob is suspended by a string from the roof. The angle in degrees which the string makes with the vertical is: (Assume that the bob does not move relative to car) `[g=10m//s^(2)]`

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