1. How well do you get the joke?

2. One dimensional motion:+x -x
Now: +x -x -y +y

6. Projectile Motion

8. Only force is due to gravity
Key Concepts:
Only force is due to gravity
What is a Projectile?
Anything that moves (in air) where the only force acting is (due to) gravity.
Is a moving football is a projectile?
Yes, if you assume
Gravity is the only force acting

10. Key Concepts: think vectors…
The instantaneous velocity v is always tangential to the path of the object v
vx = x-component of velocity vx vy
vy = y-component of velocity v vx vy

11. Vox = Vx as ax= 0 Key Concepts:  = angle to the ground
Vi = Initial Velocity
 = angle to the ground
Initial Horizontal velocity
vox = vo cos 

12. Voy changes as ay= -g Key Concepts:
Initial vertical component of velocity
voy = vo sin  Vi
 = angle to the ground

13. 2014!

14. Vertical velocity at maximum height
Key Concepts:
Learn this diagram
Time up = time down
(to same height)
Vertical velocity at maximum height
Vy = 0 m s-1
tair = 2ttop
projectile path is a parabola
Maximum Height
(occurs at half range)
Horizontal distance = RANGE