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A car is moving in a circular horizontal...

A car is moving in a circular horizontal track of radius 10 m with a constant speed of `10ms^(-1)`. A plumb bob is suspended from the roof of the car by a light rigid rod of length 1 m. The angle made by the rod with track is

A

Zero

B

`30^(@)`

C

`45^(@)`

D

`60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
c
FBD of bob is `T sin theta = (mv^(2))/(R )`
and `T cos theta = mg`
`tan theta = (v^(2))/(Rg) = ((10)^(2))/((10 xx 10))`
`tan theta = 1` or `theta = 45^(@)`
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