An equation of an object moving along a straight
line is given by s(t) = t3-4.5t2 + 0.5t, where s is
in meters and t is in seconds. The object starts at
the origin with an initial velocity of 0.5 m/s. What
is the object's displacement when its instantaneous
acceleration is equal to zero?
A) -12 m
C) 0 m
E) 6 m
B) -6 m
D) 3 m