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## Homework Statement

I'm reviewing a chapter relating linear and angular kinematics, and I came across this equation.. why does it work and where does it come from? I can't seem to find anything in the textbook explaining it.

## Homework Equations

a = sqrt( (tangential acceleration)

^{2}+ (radial acceleration)

^{2})

## The Attempt at a Solution

I know all of the basics quite well, I just don't understand where this formula came from! All help will be very appreciated.

**Please dont go too in depth and waste your time! A simple answer should definitely suffice! Thank you!**.