If z(t) (a<=t<=b) is the position function of a moving particle, what is the physical meaning of z'(t), |z'(t)|, |z'(t) dt|, and the integral from a to b of |z'(t) dt|?
If z(t) (a<=t<=b) is the position function of a moving particle, what is the physical meaning of z'(t), |z'(t)|, |z'(t) dt|, and the integral from a to b of |z'(t) dt|?