### 2D Kinematics

```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
PHY205
Ch2: 2D Kinematics
Vectors: Components
1. Main Points
Coordinates of P in 3D Cartesian Coordinates
Components of displacement from O to P in 3D in Cartesian Coordinates
PHY205
Vectors: Components
1. Main Points
Components of vector PQ
Ch2: 2D Kinematics
PHY205
Ch2: 2D Kinematics
1. Main Points
Vectors: Addition in terms of components
PHY205
Ch2: 2D Kinematics
1. Main Points
Vectors: Multiplication by a number (scalar) in 2D
Graphically
Vectors: Multiplication by number in terms of
components
PHY205
Ch2: 2D Kinematics
1. Main Points
Application: Vector displacement in 2D
Application: Vector velocity from displacement
Application: Vector acceleration from vector Vel.
PHY205
Ch2: 2D Kinematics
1. Main Points
Projectile Motion in 2 D: General equations
PHY205
Ch2: 2D Kinematics
1. Main Points
Projectile Motion in 2 D: Problem example-Range
PHY205
Ch2: 2D Kinematics
2. Discuss
Checkpoint 1. Ball Launch: Vertically and with initial vox
PHY205
Ch2: 2D Kinematics
2. Discuss
Checkpoint 2. Three ships: Same initial vo Which one is hit
first?
PHY205
Ch2: 2D Kinematics
2. Discuss
Checkpoint 3. Three ships: Same initial voy (both shells go
to same height) Which one is hit first?
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
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
vtrain car
vtrain car
```