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A car is moving in a horizontal circular...

A car is moving in a horizontal circular track of radius 10 m with a constant speed of 10 `m//s`. A bob is suspended from the roof of the car by a light rigid rod of length1m.Then the angle made by the rod with the track is

A

zero

B

`30^@`

C

`45^@`

D

`60^@`

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