Question

A car is moving in a circular horizonta track of radius 10m with a constant speed of 10 m/s. A pendulum bob is suspended from the roof of the cat by a light rigid rod of length 1.00m. The angle made by the rod with track is
A. zero
B. `30^(@)`
C. `45^(@)`
D. `60^(@)`

Answer 1

c) from figure,
`Tcostheta = mg`…………….(i)
or `Tsintheta = (mv^(2))/r`………………..(ii)
Dividing Eq. (ii) by Eq. (i)
`therefore` tantheta = v^(2)/(rg)=(10^(2))/(10xx10)=1`
`rArr theta=45^(@)`