Projectile Motion Science 9 Quarter 4.ppt

This ppt was slightly modified to suit the learners context.

1. •Can you recall the different examples of
one-dimensional motion?

2. Let’s watch this!
•Boston_Celtics_vs_Philadelphia_Sixers_1
st_Qtr_Highlights___10.16.2018,_NBA_Se
aso.mp4

3. Questions
•If you are to tell how the ball moves when
the player scores a basket, how would you
describe it?
•Does the ball follow a straight path from
the player’s hand to the hoop?

4. Group Activity
DO’S
•Participatefairly
•Contributemeaningfulideas
•Assistothergroupmembers
DON’TS
•Horseplayingisnotallowed
•Avoidshouting
•Avoidgossipingnonsense

5. Analysis
(A. Match a Curve)
•In what direction or orientation did you know the
ball?
•How would you describe the ball’s path and
motion?
•How many tries did you make to match the
curved paths?
•How many tries did you make before you
matched the curves this time?
•What does this tell you regarding visuals or
imaginary targets in sports?

6. Analysis
B. What a curve-a-throw!
•In what direction or orientation did you throw the ball?
•How would you describe the ball’s path and motion?
•Aside from doing more trials or “practices”, for this
parabola where will you place the imaginary target to
aim for better matching results?
•Based on the activity, is it possible that the ball will end
at a higher elevation than its starting level?
•What force got the ball projected?
•What force continued to act on the ball when in mid-
air?

7. Analysis
C. Of curves . . .
•How will you compare or contrast the
horizontal and vertical spacing?
•What does the spacing in the set of vertical
lines indicate about the vertical
displacement and vertical velocity of the
projectile motion?

8. What is Projectile
Motion?

9. Projectile Motion
•Two-dimensional motion of an object
–Vertical
–Horizontal

10. Types of Projectile
Motion
•Horizontal
–Motion of a ball rolling freely along a
level surface
–Horizontal velocity is ALWAYS
constant
•Vertical
–Motion of a freely falling object
–Force due to gravity
–Vertical component of velocity
changes with time
•Parabolic
–Path traced by an object accelerating
only in the vertical direction while
moving at constant horizontal velocity

11. Examples of Projectile
Motion
•Launching a Cannon ball

13. Equations used for
Projectile Motion
•X-Component
•Y-Component
•Vectorstvxx
xiif
 gtvv
ygvv
gttvyy
yiyf
yiyf
yiif



2
2
1
22
2 )sin(
)cos(


iyi
ixi
vv
vv


Note: g= 9.8
m/s^2

14. Factors Affecting
Projectile Motion
•What two factors would affect projectile
motion?
–Angle
–Initial velocity
Initial Velocity
Angle

15. Questions
•Whatarethecomponentsofprojectile
motion?
•How will you differentiate the three types of
projectile motion?
•What are the factors that would affect
projectile motion?

16. Class Exercise
•Aprojectileisthrownwithaspeedof100
ft/sinadirectionof30°abovethe
horizontal.Findtheheighttowhichitrises,
thetimeofflightandthehorizontalrange.

17. Enrichment
An object is fired from the ground at 100 m/s
at an angle of 30°with the horizontal.
•Calculate the horizontal and vertical
components of the initial velocity.
•After 2.0 seconds, how far has the object
traveled in the horizontal direction?
•How high is the object at this point?