Physics Final 2023!

position vs. time graph slope

velocity

position vs. time graph slope units

m/s

position vs. time graph difference between two points

displacement

distance on position vs. time graph

x final - x initial

when velocity and acceleration are same sign

positive

when velocity and accleration are different signs

negative

when a curve gets towards x-axis

slowing down

when curve gets farther from x-axis

speeding up

equilibrium

Fnet \= 0 (balanced forces; no acceleration; velocity \= constant)

velocity vs. time graph slope

acceleration

acceleration units (velocity vs. time graph)

m/s squared

velocity vs. time graph distance

sum of absolute value of area

multiplying/dividing with sig figs

answer should contains as many sig figs as least precise measurement

velocity vs. time graph displacement

sum up areas with correct signs

adding/ subtracting with sig figs

as many decimal places as measurement with smallest number of decimal places

\_____ are always significant

non-zero

captive zeros \__________ are always

significant

leading zeros (left of first nonzero digit) are \________ significant

never

trailing zeros are \______

only significant if decimal in the number

when in an elevator is moving up but slowing down: acceleartion is

negative

when an elevator is speeding up and moving up: acceleration is

negative

when an elevator is going down and speeding up: acceleration is

negative

when an elevator is going down and slowing down: acceleration is

positive

true weight \=

absolute value of fg

when apparent weight is less than true weight acceleration =

positive

horizontal projectile motion - total displacement \=

pythagorean theorem

for velocity final in horizontaly launched projectiles\=

find vfy and plug into pythagorean theorem with vfx

chart for horizontally launched projectile

for viy and vix with angled launched projectiles

need to plug velocity given into vix and viy formulas

angled launched projectile chart

to find max trajectory for horizontal motion

if trying to find angle measurement with angled launched projectiles

use tan (viy/vix)

to figure out if something has moved...

the Fax has to be greater than Ffs max

speed at ymax \=

horizontal velocity

little g units

m/s squared

the force of gravity can be the...

centripetal force

the centripetal force always points...

inside the circle

velocity for speed and period =

2 pi r / time

when a car is on a circular path - Fc =

Ffs

when a ball is in the air - Fc =

Fa by string

to find the Fg for universal gravitation problems

use large FG formula

centripetal acceleration units

m/s squared

centripetal acceleration - maximum possible is

less than sign

for centripetal acceleration - minimum possible is

greater than sign

J=

change in p or F x t

impulse units

kgm/s

when F and displacement are in same direction

cos 1

when F and displacement in opposite directions

cos -1

when F and displacement make 180 degree angle

cos -1

P (power) =

F x distance / time

elastic

kf = ki

inelastic

kf less than ki

calculate the total momentum

find kinetic energy final

as something goes up (conservation of energy)

gains potential and looses kinetic

as something goes down (conservation of energy)

gains kinetic and looses potential

for roller coaster - to see if it will reach

compare the total energies

for roller coaster 9.8 is

not negative

energy unit

Joules

change in momentum units

kgm/s

when the apparent weight is more than true weight

acceleration is positive

what does the scale reflect for elevator forces

normal force

when the acceleration is going down normal force is

less than weight

when acceleration is going up fn is

more than weight

when moving at constant velocity fn \=

weight

when accelerating upward

upwards acceleration

when slowing down on way down

upwards acceleration

when accelerating going down

downward acceleration

when slowing down on way up

downward acceleration

when acceleration goes upward you feel

heavier

when accleration goes downward you feel

lighter

actual weight on elevator

fg

remember for free body diagrams add

directions

for projectile motion - how far down something is \=

y displacement

displacement y for angle launched projectiles

0

speed at max heigh \=

vix

for Fg between two planets use

orbital radius

T(period) units

sec/revs

change in momentum / impulse units

kgm/s

if something is brought to rest

pf \= 0

dont forget J\=

F x t or change in p

for roller coasters -to compare kinetic energies

assume comes to rest

if same angle time and max height \=

same

coloumbs laws

abs val (add symbol based of fbd)