# What are parametric equations used for?

##### 1 Answer

Oct 5, 2014

Parametric equations are useful when a position of an object is described in terms of time

**Example 1** (2-D)

If a particle moves along a circular path of radius r centered at

**Example 2** (3-D)

If a particle rises along a spiral path of radius r centered along the

Parametric equations are useful in these examples since they allow us to describe each coordinate of the position of a particle separately in terms of time.

I hope that this was helpful.