1. PROJECTILE MOTION

2. Projectile Motion
A projectile is any object thrown/projected into the air, moving under influence of gravity.
A projectile can be a basketball, a soccer ball, a stone, an arrow, a human cannonball at a circus, a frog hopping, or even a long jumper at the Olympic game.

3. Vocabulary Projectile : The object being launched/thrown or projected.
Trajectory : The path that the projectile follows.
Range: The horizontal displacement of the projectile.
Maximum Height: The highest vertical displacement.

4. Time of flight: The time from when the object is projected to the time it
reaches the surface.
Launch Angle: The angle at which the projectile launched.
Projectile motion is two dimension motion.

6. Vertical Component: Vector which indicates the vertical velocity of projectile; V0y - Initial force.
Horizontal Component: Vector which indicates the horizontal velocity of a projectile. V0x

7. HORIZONTAL Velocity COMPONENT
Never changes, it is constant
No accelerated ax=0
Not influence by gravity

8. Changes MAGNITUDE and DIRECTION
VERTICAL Velocity COMPONENT
Changes MAGNITUDE and DIRECTION
Accelerated motion; acceleration is – 9.8m/s
Influence by gravity
As Projectile moves up - MAGNITUDE of velocity DECREASES and its direction is UPWARD.
As Projectile moves down - MAGNITUDE INCREASES and the direction is DOWNWARD.

11. Explain why an object projected horizontally and dropped vertically simultaneously will reach ground at the same instant?

14. On the graph below sketch the vertical acceleration acting on both balls A and B
Acceleration on vertical direction

18. Example
A place kicker kicks a football with a velocity of 20.0 m/s and at an angle of 53 degrees.
(a) How long is the ball in the air?
(b) How far away does it land?
(c) How high does it travel?
vo=20.0 m/s
q = 53