It depends what subject you are photographing, what speed the subject is travelling at, what lens your are using and getting the right shutter speed / aperture to match to create the right motion blur. shutter speeds of 1/30 1/60 or even 1/125 aren't easy to get right. So apply the 1 over focal length rule explained below.
A common rule of thumb for estimating how fast the exposure needs to be for a given focal length is the one over focal length rule. This states that for a 35 mm camera, the exposure time needs to be at least as fast as one over the focal length in seconds. In other words, when using a 200 mm focal length on a 35 mm camera, the exposure time needs to be at least 1/200 seconds-- otherwise blurring may be hard to avoid. Keep in mind that this rule is just for rough guidance; some may be able to hand hold a shot for much longer or shorter times than this rule estimates. For users of digital cameras with cropped sensors, one needs to convert into a 35 mm equivalent focal length.
That will help with setting up the right shutter settings.
Now, Panning is a technique which requires mastering over time, its not something that you can instantly do and repeat. It require training you body to become familiar with the motion, thus it become almost automatic. What this will achieve is a smooth pan, something that is not easy to master.
Pick up the subject early, focus and pan with the subject, take them image when subject fills 2/3 of the frame, continue the pan after the shot, try and avoid stopping the pan or jerking at the edge will also aid in good results.
You are able to capture pans at slower shutter speeds, but to get everything right in the shot takes practice and a very smooth pan movement, taken at 1/100sec, but generally, I'm taking shots at 1/200 or 1/320 sec because of the speed of the bikes and slightly slower for cars....
1/100 sec
1/320 sec
or even 1/640 sec, but still generate motion blur
As for a tripod or monopod, it depends on your lens. Mainly used for the larger lenses like the 300. 400, 500mm primes due to weight, you don't need support for a 70-300mm lens.