Physics Grade 10 New curriculum Unit 2. 2.3 Acceleration

Physics Grade 10 New curriculum Unit 2
2.3 Acceleration
While traveling in a bus or a car, you might have noticed that sometimes its speed increases and sometimes it slows down. That is, its velocity changes
with time. The quantity that describes the rate of change of velocity in a
given time interval is called acceleration. Any change in velocity whether
positive, negative, directional, or any combination of these is acceleration.
In everyday conversation, to accelerate means to speed up. Thus, the
greater the acceleration is, the greater the change in velocity over a given
time is.
Average acceleration
The magnitude of the average acceleration is defined by the change in an
object’s velocity divided by the time interval in which the change occurs.