Chapter 2, Section 4

Projectile Motion: Launching Things into the Air

October 5, 2010HW: 2.4 PTG #1-7, Skip 4, Due ThursdayP/T Conferences: Oct. 6-7, 4-7:30pm . Report Cards will be given at conferences

Do Now: WDYS/WDYT

• Pg. 174

Agenda: Do Now LO/SC 2.4 Investigate pg. 174-

176

Learning Objective: Compare horizontal

motion to vertical motion in projectile motion

Success Criteria: Apply the terms free fall, projectile,

trajectory, and range Provide evidence concerning

projectiles launched horizontally from the same height at different speeds (including zero launch speed)

Explain the relationship between the vertical and horizontal components of a projectile’s motion

2.4 Investigate: Part A Coins

Set up NotebooksAssign Jobs#1-2 minutes#2-5 minutes#3-10 Minutes#4-5 Minutes

2.4 Investigate: Part A

Teacher Demo of coins (pennies, quarters, penny and quarter)

http://www.youtube.com/watch?v=qErh402eJgI

2.4 Investigate: Part B Vertical and Horizontal Motion of a Projectile

Teacher Demo

October 6, 2010HW: 2.4 PTG #1-7, Skip 4, Due ThursdayP/T Conferences: Oct. 6-7, 4-7:30pm . Report Cards will be given at conferences

Do Now: Describe what would

happen if you dropped a bowling ball and a marble from the same height.

Agenda: Do Now LO/SC Physics Talk Quiz

Learning Objective: Compare horizontal motion to vertical motion

in projectile motion Explain the impact of gravity in free falling

objects Explain how initial velocity and the angle of

velocity impact the range of an object with projectile motion

Success Criteria: Apply the terms free fall, projectile, trajectory,

and range Provide evidence concerning projectiles

launched horizontally from the same height at different speeds (including zero launch speed)

Explain the relationship between the vertical and horizontal components of a projectile’s motion

Recognize the factors that affect the range of projectiles

Infer the shape of a projectile’s velocity.

2.4 Physics Talk

What is a projectile?

What happens to two objects that are dropped at the same time if there is little/no air resistance?

An object traveling through the air

They will hit the ground at the same time

2.4 Physics Talk

Does the horizontal motion of the object affect the time it hits the floor?

No! Horizontal motion and vertical motion are independent of each other!

2.4 Physics Talk

What happens to velocity with projectiles?

Horizontal velocity remains the same!

Vertical velocity is constantly changing (acceleration due to gravity)

Horizontal and vertical velocity can be combined to predict the range of a projectile.

What do you think now?

Answer question on pg. 181

2.4 Quiz