“Prędkość to nie to samo co szybkość”
„Velocity is not the same than speed”
„Speed (szybkość), in
physics jargon, keeps its ordinary meaning --- it is simply a measure of how fast
something's moving, and gives no clue about which direction it's moving in.
Velocity (prędkość), on the other hand, in physics jargon includes direction. For motion along a straight line, velocity can be positive or negative. For a given situation, such as Gdynia to Sopot, we have to agree beforehand that one particular direction, such as away from Gdynia, counts as positive, so motion towards Gdynia would then always be at a negative velocity (but, of course, a positive speed, since speed is always positive, or zero)."
I N F O R M A C J E dla poszczególnych grup
„POMOST” dla rozpoczynających studia