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

PHY205 Ch2: 2D Kinematics

1. Recall main points: position, displacement, velocity and acceleration (geometrically and algebraically)

2. Discuss Pre-lecture and Check Points3. Sticky Points

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Vectors: Components

Coordinates of P in 3D Cartesian Coordinates

Components of displacement from O to P in 3D in Cartesian Coordinates

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Vectors: Components

Components of vector PQ

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Vectors: Addition Graphically

Vectors: Addition in terms of components

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Vectors: Multiplication by a number (scalar) in 2D Graphically

Vectors: Multiplication by number in terms of components

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Application: Vector displacement in 2D

Application: Vector acceleration from vector Vel.

Application: Vector velocity from displacement

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Projectile Motion in 2 D: General equations

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Projectile Motion in 2 D: Problem example-Range

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Checkpoint 1. Ball Launch: Vertically and with initial vox

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Checkpoint 2. Three ships: Same initial vo Which one is hit first?

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Checkpoint 3. Three ships: Same initial voy (both shells go to same height) Which one is hit first?

PHY205 Ch2: 2D KinematicsYou 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 monkeyB) Below the monkeyC) 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 carB) At the center of the carC) Backward of the center of the car

vtrain carvtrain car