If you take a photo with a 1/30 shutter speed, but the objects in the photo were not moving, will the picture appear blurry? Or will they appear clear?
If the camera and subject are not moving at all, then the photo will have no motion blur regardless of how slow the shutter is.
Obviously, these things are all relative. Even when you hold the camera very still it is still subject to enough movement to affect sharpness in long exposures.
Amount of camera movement scale:
- Heavy tripod, remote (or timed) shutter release, indoors
- Firm tripod, good weather
- Monopod or held against a firm object such as a pole.
- Flimsy tripod or firm tripod in windy weather
- Hand held, leaning shoulder against firm object like a building.
- Hand held, standing firmly, good stance
- Hand held, poor stance
- Hand held while walking or moving in vehicle
(Note: I have a feeling number 4 should be even lower - a flimsy tripod in the wind may be worse than hand-held leaning against a building).
With (1) motion blur is practically non-existent even at slow shutter speeds. With (8) even using a shutter speed of 1/1000s you're still likely to see some motion blur.
And, obviously, your subject needs to be similarly still (and, as TFuto pointed out in the comments, your light source).