The only caveat I would add to the explanations above it that it is useful to take the crop factor into account when selecting shutter speeds for hand-held shots - i.e., 1/focal length. When using a 200mm lens on a 35mm format, you should choose a shutter speed of 1/200 or higher.
That rule of thumb is based on 35mm formats. If the sensor is cropping down the image to an angle of view that would be achieved with a lens 1.5 times the focal length you're using, then you should pick a faster shutter speed for hand-held shots. When hand-holding a 1.5 crop camera with a 200mm lens, you should ensure a shutter speed that is 1/300 or higher.