The faster an object is moving, the the shutter speed needs to be in order to freeze motion.

The faster the shutter speed, the shorter the time the image sensor is exposed to light; the slower the shutter speed, the longer the time the image sensor is exposed to light. ... If you are photographing a subject that is in motion, you will get different effects at different shutter speeds.

You should use a shutter speed that is at least 1/500th of a second or higher. However, remember that fast shutter speeds may result in underexposed photographs.

Hope it helps you:)