Why does a pendulum in a car swing outwards when the car drives in a circle?

[zaddyzad]

Homework Statement

If we attach a pendulum to the roof of a car and drive the car in a circle, why does the circle swing outwards away from the center of the circle.

Homework Equations

The Attempt at a Solution

I don't understand the idea that inertia causes this, can some 1 clarify this for me.

 

[zaddyzad]

Same idea of swinging a mass at the end of a string, what keeps the mass at the end of the string, I don't understand the idea of "centripetal force". In quotations because I know its not really a force.

 

[e^(i Pi)+1=0]

What keeps the mass at the end of the string? The string does. The object is trying to move in a straight line, but the string is causing a constant acceleration towards the center of the circle.

 

[zaddyzad]

Though what about the pendulum in the car.