Unit 1 notes Flashcards
Vector
has both direction and magnitude
standard notation
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)
v = 80m/s @ 130º
cardinal or vector
vector
d = 151km @ 220º
cardinal or vector
vector
20º North from East
cardinal or vector
cardinal
60º West from South
cardinal or vector
cardinal
vectors are similar to ____, you always start from the postive x-axis
coterminal angles
force
a push or pull from one object to another
is a vector
free body diagram
a drawing that shows both the direction and magnitude of forces acting upon an object
* arrows can only push outward
gravity
an active force between objects and earth
tension
a pulling force from a rope or chain
normal force
a support force that keeps things on the a surface
like so they don’t fall thru the earth and stuff
friction
resistance to motion between touching surfaces
applied force
force is applied to one object by another
- ex. pushing a box (hands stay on box)
where do gravity arrows ALWAYS point
down
where do tension arrows ALWAYS point
in alignment with the rope/chain/string
where to normal force arrows point
PERPENDICULAR to the surface
what is also considered friction…
air resistance
so it follows friction rules
friction arrows always…
- go in the opposite direction of the movement
- paraellel to the surface
applied force arrows…
follows the direction of movement
Equilibrium
something that stays constant
- no change in motion (doesn’t increase or decrease)
Net force
total of teh acting forces on an object
balance forces
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
