Toggling Power On and Off

I'm currently using an Arduino Uno, and I was wondering if there was a way to toggle the power on and off of the +5V so that I can power on and off a DC Motor (note: we're designing the circuits themselves, I just need to figure out if there's a way to turn power on and off to the motors). Any help is appreciated.

Amplify the pin current with a transistor.

I figured out what the issue was. It's my own fault for not reading the documentation.