Ch 2- 2D Motion

Question 1

Cartesian method

Answer 1

No direction
Like trig circle, counterclockweise
Find angle from head of resultant

Question 2

Navigator method

Answer 2

Measure of how many degrees towards one of the other compass points that resultant moved
Ex: 30 degrees E of N (of is from)
OR
[N30E]- start at north, end east

Question 3

BEARING

Answer 3

N-0 degrees
E-90 degrees
S-180 degrees
W-270 degrees

Question 4

Collinear

Answer 4

Vectors that point in the same direction

Question 5

Non-collinear?

Answer 5

Break vectors into components (right angle every time) 
Add collinear (vertically)
Create resultant triangle

Question 6

Relative motion

Answer 6

Different people will say different things about the motion of the same object

Question 7

Frame of reference

Answer 7

Where you are relative to the object

Question 8

Relative velocity

Answer 8

Object relative to where the person is
Forward-add reference frame
Backwards-subtrace reference frame

Question 9

Mutually independent

Answer 9

Two components working together but measure seperate things

If one changes it will only affect the RESULTANT (which is also the relative/total velocity)

Question 10

Components in projectiles

Answer 10

Horizontal-uniform motion
Vertical-acceleration
ONLY SHARE TIME

Question 11

Calc time of projectile at an angle

Answer 11

Assume object falls at same height & is traveling at same velocity
a=(Vf-Vi)/t

Question 12

Resultant

Answer 12

Do not use when finding angle

Starts at beginning of first vector & ends at tip of last vector