Acceleration and Force
Chapter 3 Section 2 – Pages 76-80
Acceleration and Force
I.
Acceleration – a change in velocity over
given time interval
A. The SI units for acceleration  m/s2
(Meters per second squared)
Acceleration and Force
B. Equation
a
=
ΔV = Vf – Vi
Δt
tf - ti
Note:
Vf = final velocity,
Vi = initial velocity
Δ = Greek letter delta = “a change in”
The larger the acceleration, the faster the
object is speeding up or slowing down
Acceleration and Force
C. Acceleration can be positive or negative
 For our purposes:
- Positive acceleration =
speeding up
- Negative acceleration =
slowing down
Acceleration and Force
D. Acceleration can be determined from a
velocity – time graph (page 79)
Acceleration and Force
• Homework:
 Acceleration problems worksheet
- acceleration problems #1-5
(be sure to all steps)
Read Chapter 3 section 2 (pages 76-80)