Chapter 6Motion in Two Dimensions

Section 6.1Projectile Motion

How do I separate projectile motion into horizontal and vertical components?

How can I utilize kinematic equations to solve projectile motion problems?

Projectile MotionExamples?

PathPath?

Trajectory – the path of a object experiencing projectile motion

Projectile MotionProjectile – an object shot through the air

Can be anything

Kinematic Equations apply

While the projectile is traveling we can draw a free body diagram

Free – Body Diagram

From a cliff…If I drop a ball off a cliff, what is the force

acting on it?

What if I push it off the cliff?

What if I shoot it up at an angle off the cliff?

Gravity!Gravity is the only acceleration in projectile

motion problems

Does gravity apply horizontally?

Is there any acceleration in the horizontal direction?

Application to equations?

Trajectories of Two Softballs Total Time?

Free–Body Diagrams

StrategiesList Data by Horizontal and Vertical

What is the initial horizontal velocity?

What is the initial vertical velocity?

Is there a launch angle?

What is the launch height?

What is the launch length?

Velocity ComponentsWhat if Vx = 8 m/s and Vy = 10 m/s?

ExamplesA bowling ball is rolled off a 50 m high cliff

with a velocity of 5 m/s.How long does it take the ball to reach the

ground?How far from the base of the cliff does the

ball hit the ground?What are the horizontal and vertical

components of the velocity just before it hits the ground?

HomeworkPage 150, # 1 – 3Tossed Ball Worksheet

Firing a Cannonballhttp://phet.colorado.edu/sims/projectile-

motion/projectile-motion_en.html

Short CutsOnly if the initial height equals the final

height

ExampleA ball is launched at 4.5 m/s at 66° above the

horizontal. What are the maximum height and flight time of the ball?

HomeworkProjectile Motion Worksheet