I am a beginner to the part of quantum physics and I am not getting the ideas well enough.I am reading it on the Feynman Lectures. But the uncertainity principle does not give any hint and it does not reveal itself at all in our day to day lives. Suppose a man starts to run at uniform velocity,say v, from t=0 and goes on,isnt it very much possible to know his position and momentum at any point of time?? Where's the uncertainity there?? Please help me out.