12+-+Circular+Motion


 * Circular Motion **

**Anything which travels in a circular path: ** Note: A force is also required due to **Newton II** ( F=ma ) - because it is accelerating, there must be an unbalanced force.
 * Is constantly //changing direction// and therefore its velocity is constantly changing.
 * Is accelerating because its velocity is constantly changing.
 * Requires a force to keep it traveling in this direction. This force is called the **centripetal force**.


 * Centripetal force acts radially inwards.
 * The acceleration is always in the direction of the unbalanced force, i.e. radially inwards.
 * The direction of the velocity is always at a tangent to the circular path.
 * If the //centripetal force ceases to exist, the object would travel at a tangent// to the circular path (in the direction of the velocity at that point).

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