A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A plumb bob is suspended from the roof of the car by a light rigid rod. The angle made by the rod with the vertical is `(g = 10 m//s^(2))`

Options

A. zero
B. `30^(@)`
C. `45^(@)`
D. `60^(@)`

Answer

C

Explanation

`tantheta(v^(2))/(Rg)=((10)^(2))/((10)(10))=1`
`theta=45^(@)`