Night 5 Reading:Acceleration Acceleration can be defined as a
change in velocity over a period of time. Usually, we think of
this as a change in speed. Remember, velocity is a vector with
both a magnitude and a direction. So there are two ways to
change the velocity of an object. We can change either the speed
or the direction of that speed (or both at the same time!) Like
velocity, acceleration is a vector with a magnitude and a
direction. If the direction of the velocity is not changing,
then we can express the acceleration as the rate of change of
the speed, Where a is acceleration, v is velocity, and t is
time. Since velocity is the rate of change of position, we could
also think of acceleration as the rate of change of the rate of
change. Acceleration is how much we speed up (or down) in a
given second. If you were watching a car advertisement, they
might tell you that a car can go from 0 to 60 miles per hour in
6 seconds. Thus the units for acceleration might be given as
miles/hour/second. Although usef