You don’t need a VectorForce or any kind of force. If you want the camera to lag behind How would I create a 'OverTheShoulder' - "lagging" behind camera? or How would I replicate this camera work?.
If you want the camera to ‘bob’ or sway then use the search tool above to look for “camera bob” or “camera sway” since there are quite a few solved posts about that.