Simple Harmonic Oscillation Frequency in a Traveling Car

[sru]

Homework Statement

A simple pendulum of mass m and lenghth l is suspended in a car traveling with a constant speed v around a circle of radius r.If the pendulum undergoes small oscillations about its equilibrium position, what will be the frequency of the oscillations??

Homework Equations

$$n=1/2\pi (\sqrt{l/g}$$)
$$mv^2/r =mg$$

The Attempt at a Solution

 

[merryjman]

No attempt at a solution = no advice