1. ACCELERATION

2. final velocity -- initial velocity V final - V initial time t
ACCELERATION
- Acceleration is the _________ at which the _____________ of a
moving object changes. (Actually includes both speeding up and
slowing down)
rate
velocity
-Velocity describes the ____________ of an object.
-Acceleration describes how the ______________ changes.
motion
motion
acceleration = _____________________ or a = ______________
final velocity -- initial velocity
V final - V initial
time t
-Possible units for velocity are: ________________________________
-Since acceleration is the rate at which velocity changes its unit will be
any unit for ______________ over ________________.
Ex. ____________________________
m/s due north, mi/h due east, cm/day due west, etc.
velocity
time
m/s/h, mi/h/min, cm/day/hour (due North)

3. the same you can square them. 2 3 = 3 1
-What if the two time units are the same?
5 m
5 m/s/s
also written as s s 2 3 3 2
5 m/s
So, if the time units are
the same you can square them. 2 3 = 3 1
(another way to write this is . . .) 2 2 1 x = 3 3 2 3

4. V final - V initial a= t 15 m/s - 10 m/s a= 1 s 5 m/s 2 a=
Sample Problems:
-Captain America is running north at a velocity of 5 m/s. Noticing
that he is not catching up to the villain he is chasing he decides to pick
up his speed. Within one second he increases his velocity to 10 m/s.
Within one more second he increases his velocity from 10 m/s to
15 m/s. What is his acceleration?
V final - V initial a= t
15 m/s - 10 m/s a=
1 s
5 m/s 2 a=
5 m/s/s or 5 m/s a=
1 s

5. V final - V initial a= t 32 m/s - 0 m/s a= 4 s 32 m/s a= 4 s 2
-How quickly would the Batmobile accelerate if it’s forward velocity
changed from 0 to 32 meters per second in 4 seconds?
V final - V initial a= t
32 m/s - 0 m/s a=
4 s
32 m/s a=
4 s 2
8m/s/s or 8 m/s a=

6. V final - V initial a= t 222 mi/h - 204 mi/h a= 2 s 18 mi/h a= 2 s
-What would be the acceleration of Hawkeye’s arrow if its speed
increased from 204 miles per hour to 222 miles per hour
within 2 seconds?
V final - V initial a= t
222 mi/h mi/h a=
2 s
18 mi/h a=
2 s
9 mi/h/s a=

7. deceleration negative V final - V initial a= t
-_________________ is a word often used to describe a decrease in
velocity. Since acceleration includes any change in velocity (increase
or decrease) deceleration is calculated using the same formula.
-When calculating deceleration you will always end up with a
______________ answer.
deceleration
negative
V final - V initial a= t

8. -Since acceleration measures changes in velocity, an object that
changes either its ______________ or _________________ is
accelerating. An object may be accelerating even if its speed is
constant.
speed
direction

9. accelerating decelerating constant velocity going backwards stopped
Line Curved up= _____________
Line Curved down= ____________
Straight line angled up= __________
Straight line angled down= _________
Flat Horizontal line= ____________
Flat Vertical line= ___________
accelerating
decelerating
constant
velocity
going
backwards
stopped
not possible

10. increasing your rate of accelerating increasing your rate
Line Curved up= _____________
Line Curved down= ____________
Straight line angled up= __________
Straight line angled down= _________
Flat Horizontal line= ____________
Flat Vertical line= ___________
increasing your rate
of accelerating
increasing your rate
of decelerating
constant
acceleration
constant
deceleration
constant
speed
not possible