College Physics I Physics 1401 Twentieth Class

1
College Physics I - Physics 1401Twentieth Class

• Ranking Tasks
• 2-D Kinematics
• Math Representation
• Projectile Motion Intro
• Horizontal Projectile Motion
• Lab Activity

2
Ranking Tasks

• A conceptual exercise
• The word statement
• Statement of the situation with information given
• Question of what is to be ranked
• The figures
• Usually 6 to 8 similar figures, but with
  different values
• The ranking
• Usually from highest (greatest) to lowest
  (smallest)
• Alternatives
• The reasoning statement
• The confidence level

3
Ranking Task Exercises

• 1-D Kinematics
• Motion Diagrams - pages 2 3
• Vertical Motion - page 7
• Motion Dot Diagrams - page 12
• Forces
• Vertical Motion - pages 21 22
• Rope Tension - pages 24 28
• Moving Car and Boat - pages 31 32
• Force Difference - page 40

4
2-D Kinematics - Projectile MotionMath
Representation

• Same Kinematics Equations for Constant
  Acceleration
• Need to Write the Equations in 2-D
• x - direction
• y - direction

5
2-D Motion - Projectile Motion

• Horizontal Projectile Motion - initial velocity
  of object is horizontal
• Example
• Example
• General Projectile Motion - initial velocity of
  object is projected at an angle to the horizontal
• Example
• Example

6
Next Class

• Homework to be Turned In
• Ranking Tasks
• Projectile Motion Problems
• TEST 2