Unit 1 notes

Question 1

Vector

Answer 1

has both direction and magnitude

Question 2

standard notation

Answer 2

the direction given as an angle in standard position
- ex. 53 degrees, North from East
- (you’re moving 53 degrees north from the south line)

Question 3

v = 80m/s @ 130º

cardinal or vector

Answer 3

vector

Question 4

d = 151km @ 220º

cardinal or vector

Answer 4

vector

Question 5

20º North from East

cardinal or vector

Answer 5

cardinal

Question 6

60º West from South

cardinal or vector

Answer 6

cardinal

Question 7

vectors are similar to ____, you always start from the postive x-axis

Answer 7

coterminal angles

Question 8

force

Answer 8

a push or pull from one object to another

is a vector

Question 9

free body diagram

Answer 9

a drawing that shows both the direction and magnitude of forces acting upon an object
* arrows can only push outward

Question 10

gravity

Answer 10

an active force between objects and earth

Question 11

tension

Answer 11

a pulling force from a rope or chain

Question 12

normal force

Answer 12

a support force that keeps things on the a surface

like so they don’t fall thru the earth and stuff

Question 13

friction

Answer 13

resistance to motion between touching surfaces

Question 14

applied force

Answer 14

force is applied to one object by another
- ex. pushing a box (hands stay on box)

Question 15

where do gravity arrows ALWAYS point

Answer 15

down

Question 16

where do tension arrows ALWAYS point

Answer 16

in alignment with the rope/chain/string

Question 17

where to normal force arrows point

Answer 17

PERPENDICULAR to the surface

Question 18

what is also considered friction…

Answer 18

air resistance

so it follows friction rules

Question 19

friction arrows always…

Answer 19

• go in the opposite direction of the movement
• paraellel to the surface

Question 20

applied force arrows…

Answer 20

follows the direction of movement

Question 21

Equilibrium

Answer 21

something that stays constant
- no change in motion (doesn’t increase or decrease)

Question 22

Net force

Answer 22

total of teh acting forces on an object

Question 23

balance forces

Answer 23

forces that act on the same object that are equal and opposite

ex. a game of tug of war, but each side has equal strength