This science class document discusses uniformly accelerated motion. It defines acceleration as a change in velocity over time and can be constant or varying. Examples of uniform acceleration provided include a car increasing its speed at a constant rate and objects in free fall near Earth's surface, where gravity causes constant acceleration. Worksheets assess student understanding of scenarios that do and do not exhibit uniform acceleration and provide opportunities for class discussion and lesson recap.

1. SCIENC
E
CLASS
GRADE
9
Teacher Charmaine Canono

2. Welcome!
Are you excited for a
fun learning session?

3. TODAY'S
SCIENCE
LESSON

4. Who are they and what do they
do?
They play a crucial role in
maintaining the flow of traffic and
in implementing laws and rules and
regulations on the road that every
motorist should follow.
Describing Uniformly
Accelerated Motion
Qualitatively
Pasig City Traffic and Parking Management Officers.

5. ACCELERATION
• is defined as the rate of change
in velocity with time. It is a
vector quantity having both
magnitude and direction.
Acceleration of vehicles usually
changes from time to time. A
vehicle may speed up as it
travels to highways or slow
down as it approaches an
intersection.
• It should also halt when the
stoplight is red and eventually
accelerate when the light turns
green. We can say that most
type of acceleration that we
observe is not constant or non-
uniform due to these factors.

6. When you are riding a
vehicle, you can say
that it speeds up or
slows down based on
its speedometer.
A
speedometerindicates
the speed of a vehicle,
it is usually combined
with a device known as
an odometer that
records the distance
traveled

7. Assume that you are
riding a vehicle and
observed these
speedometer
readings
• This means that the
vehicle speeds up.
Every minute there is a
1 km/h increase on the
speed of the vehicle.
The increase for every
minute is constant,
therefore we can say
that the vehicle has
uniform acceleration.
The vehicle in the example
above exhibits a uniform
or constant acceleration.
It is a type of motion in
which the velocity of an
object changes by an
equal amount in every
equal time period.
Elapsed Time Reading on the
Speedometer
After 1 minute 30 km/h
After 2 minutes 31 km/h
After 3 minutes 32 km/h

8. Examples and
Illustrations
ACCELERATION
represents how velocity
changes with time,
Acceleration represents
how velocity changes
with time.
VELOCITY
velocity
represents how
position changes
with time

9. GRAVITY
Gravity pulls the coin
down. Things that are
thrown upward, will go
down because of this
force. Gravity also pulls us
towards the earth. That is
why we are not being
thrown outside space.

10. What floor was your classroom
when you were in Grade 7 and 8?
Was it on the 4th, 5th or 6th floor
of the school building? Which is
easier, climbing to your classroom
or going down to the school
canteen?
When you climb a high place, you
go against gravity. When you are
on a high place, and you go down,
you are moving toward gravity so
you use less force.
Describing Uniformly
Accelerated Motion
Qualitatively

11. Same is true with freely-
falling objects.
Objects at free-fall also
exhibit uniformly accelerated
motion. The acceleration due
to gravity neglecting air
resistance, is a constant
acceleration for all falling
bodies, regardlessof their
mass and weight.

12. Definition of an uniformly
accelerated motion
The uniformly accelerated
motion is a motion that is
characterized for having a
movement in a straight line
and a constant acceleration
and different of zero,
therefore the velocity of an
object in this movement is
constantly changing
depending on the direction of
the velocity.

13. Main characteristics of the
uniformly accelerated
motion.
to identify when we are talking
about a uniformly accelerated
motion is necessary to know
the parameters of this motion:

14. • Its trajectory is in a straight
line which means that this is
a motion that only moves in
one dimension.
• Its acceleration is different
than zero, and this is the
main difference between this
motion and the constant
velocity motion. Its velocity is
changing constantly,
because of the acceleration,
the velocity increases or
decreases permanently, this
is why in the problems of this
motion there is always going
to be an initial velocity and a
final velocity

15. • The acceleration is the
constant change of the
velocity.
• The sign or the direction that a
velocity or an acceleration has
could give a preview of what
the movement is going to be
like, if both acceleration and
velocity have the same sign,
then the object will increase
the velocity every second, but
if this magnitudes have
different signs (for example a
positive velocity and a
negative acceleration) then
the object will start to slow
down every second until it is
at rest.

16. • When can we
say that an
object exhibits
uniformly
accelerated
motion?

17. Activity Time
Like seatworks, student-led activities that can be
done by pairs or by group widen their grasp and
interpretation of the lesson. Be creative with the
activity with clear directions and a set number of
minutes to finish. Duplicate this page as many
times as needed to give you more space for
discussion.
Add instructions or guidelines here

18. Seatwork
“Am I in UAM (Uniformly
Accelerated Motion)?”
Analyze each scenario. Write
UAM if it exhibits Uniformly
Accelerated Motion, write
Non-UAM if it DOES NOT
_______________ 1. A bike that is at rest.
_______________ 2. A boy holding a book.
_______________ 3. A girl walking leisurely.
_______________ 4. A hanging picture frame.
_______________ 5. A rock falling from a cliff.
_______________ 6. A fruit dropping from a tree.
_______________ 7. A rolling ball on an inclined
plane.
_______________ 8. A man standing still in an
escalator.
_______________ 9. A car increasing its velocity
at a constant rate.
_______________ 10. A truck running with a
constant acceleration

19. Worksheet
FACT or BLUFF. The following statements are about bodies and objects exhibiting
Uniformly Accelerated Motion (UAM). Write FACT if the statement is TRUE and
write BLUFF if the statement is FALSE.
_______________ 1. Acceleration is constant in bodies in uniformly accelerated
motion.
_______________ 2. UAM can only be observed along the horizontal line of
action.
_______________ 3. Objects at free-fall exhibit uniformly accelerated motion.
_______________ 4. In UAM velocity changes but at a constant rate.
_______________ 5. An object in UAM has zero acceleration.

20. LET'S CHECK YOUR WORK!

21. Use this space for final announcements or
ways students can approach you if ever
they have questions.
THANK YOU
FOR
ATTENDING!

22. Lesson Recap 3
Recaps can also be led by students
for a more enriching experience.
Lesson Recap 1
Cap off a productive class with key
summary points students can
easily remember.
Lesson Recap 4
Cap off a productive class with key
summary points students can
easily remember.
Lesson Recap 2
You can provide this for the class
as a way of wrapping up everything
you've discussed.
Lesson Recap 5
You can provide this for the class
as a way of wrapping up everything
you've discussed.
Summary of Class

23. Free Icon
Resources
Use these free recolorable icons and
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