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Question

A ball is suspended by a thread from the ceiling of a car. The brakes are applied and the speed of the car changes uniformly from 36kmph to zero in 5s. The angle by which the ball deviates from the vertical (g=10ms−2) is :

A
tan1(13)
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B
sin1(15)
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C
tan1(15)
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D
cot1(13)
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