1. Horizontal Projectiles
Demo: Which ball falls faster to the ground?
Video: MYTHBUSTERS – Bullet Fired vs. Dropped

2. y vi
viy=0
Height = Dy
time = t x

3. y
vix=vi
time = t x
Range = Dx

4. y x

5. y x

6. y
ax = 0 m/s2
time = t
ay = g
= m/s2 x

7. Horizontal Motion of a Horizontal Projectile is Constant Motiony
X – constant motion
ax=0 (horizontal)
vx=vi=constant
dx=vit x

8. Vertical Motion of a Horizontal Projectile is Accelerated Motion (Free Fall)y
Y – accelerated motion
ay=-9.81 m/s2 (free fall)
vy=0+(-9.81 m/s2 )t
dy=H+( m/s2 )t2 x

9. A Horizontal Projectile is Half of a Parabola, and is the Addition of 2 Independent Motionsy
Horizontal Projectile (half parabola) =
Constant Motion (horizontal) +
Accelerated Motion (vertical) x