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

`tan theta =(v^(2))/(rg)=(10xx10)/(10xx10)`
`tan theta =1`
` theta=tan^(-1)(1)`
`=45^(@) `