# PHY205 Ch2: 2D Kinematics

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14 Νοε 2013 (πριν από 4 χρόνια και 6 μήνες)

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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:
2
D 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

PHY205

Ch2:
2
D Kinematics

1.
Main Points

Vectors: Components

Components of vector PQ

PHY205

Ch2:
2
D Kinematics

1.
Main Points

Vectors: Addition in terms of components

PHY205

Ch2:
2
D Kinematics

1.
Main Points

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

Vectors: Multiplication by number in terms of
components

PHY205

Ch2:
2
D Kinematics

1.
Main Points

Application: Vector displacement in 2D

Application: Vector
acceleration from vector Vel.

Application: Vector velocity from displacement

PHY205

Ch2:
2
D Kinematics

1.
Main Points

Projectile Motion in 2 D: General equations

PHY205

Ch2:
2
D 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
v
ox

PHY205

Ch2: 2D Kinematics

2.
Discuss

Checkpoint 2. Three ships: Same initial
v
o

Which

one is hit
first?

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?

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

v
train car

v
train car