Chapter 0 Preface 2) Derivative of a function(函数的导数) Motion with constant Motion with changing velocity speed 2 v() S(2)-s(41) v()2 S(2)-S(1) t2-t1Chapter 1Chapter 1 Measurment Chapter 0 Preface 2) Derivative of a function(函数的导数) • Motion with constant velocity t s t1 t2 2 1 2 1 ( ) ( ) ( ) t t s t s t v t − − = t s t1 t2 • Motion with changing speed 2 1 2 1 ( ) ( ) ( ) t t s t s t v t − − ? =