Motion Along a Line The graphs in Exercises 105 and 106 show the position s = f(t) of an object moving up and down on a coordi-
nate line. (a) When is the object moving away from the origin?
Toward the origin? At approximately what times is the (b) velocity
equal to zero? (c) Acceleration equal to zero? (d) When is the accel-
eration positive? Negative?
105.
S