1. PHY205 Ch2: 2D Kinematics 1.Recall main points: position, displacement, velocity and acceleration (geometrically and algebraically) 2.Discuss Pre-lecture and Check Points 3.Sticky Points

2. PHY205 Ch2: 2D Kinematics 1. Main Points Vectors: Components Coordinates of P in 3D Cartesian Coordinates Components of displacement from O to P in 3D in Cartesian Coordinates

3. PHY205 Ch2: 2D Kinematics 1. Main Points Vectors: Components Components of vector PQ

4. PHY205 Ch2: 2D Kinematics 1. Main Points Vectors: Addition Graphically Vectors: Addition in terms of components

5. PHY205 Ch2: 2D Kinematics 1. Main Points Vectors: Multiplication by a number (scalar) in 2D Graphically Vectors: Multiplication by number in terms of components

6. PHY205 Ch2: 2D Kinematics 1. Main Points Application: Vector displacement in 2D Application: Vector acceleration from vector Vel. Application: Vector velocity from displacement

7. PHY205 Ch2: 2D Kinematics 1. Main Points Projectile Motion in 2 D: General equations

8. PHY205 Ch2: 2D Kinematics 1. Main Points Projectile Motion in 2 D: Problem example-Range

9. PHY205 Ch2: 2D Kinematics 2. Discuss Checkpoint 1. Ball Launch: Vertically and with initial v ox

10. PHY205 Ch2: 2D Kinematics 2. Discuss Checkpoint 2. Three ships: Same initial v o Which one is hit first?

11. PHY205 Ch2: 2D Kinematics 2. Discuss Checkpoint 3. Three ships: Same initial v oy (both shells go to same height) Which one is hit first?

12. PHY205 Ch2: 2D Kinematics You are a vet trying to shoot a tranquilizer dart into a monkey hanging from a branch in a distant tree. You know that the monkey is very nervous, and will let go of the branch and start to fall as soon as your gun goes off. In order to hit the monkey with the dart, where should you point the gun before shooting? A) Right at the monkey B) Below the monkey C) Above the monkey

13. PHY205 Ch2: 2D Kinematics A flatbed railroad car is moving along a track at constant velocity. A passenger at the center of the car throws a ball straight up. Neglecting air resistance, where will the ball land? A) Forward of the center of the car B) At the center of the car C) Backward of the center of the car v train car