Physics Final 2023!
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Last updated 7:21 PM on 5/30/23
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83 Terms
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position vs. time graph slope
velocity
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position vs. time graph slope units
m/s
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position vs. time graph difference between two points
displacement
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distance on position vs. time graph
x final - x initial
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when velocity and acceleration are same sign
positive
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when velocity and accleration are different signs
negative
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when a curve gets towards x-axis
slowing down
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when curve gets farther from x-axis
speeding up
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equilibrium
Fnet \= 0 (balanced forces; no acceleration; velocity \= constant)
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velocity vs. time graph slope
acceleration
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acceleration units (velocity vs. time graph)
m/s squared
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velocity vs. time graph distance
sum of absolute value of area
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multiplying/dividing with sig figs
answer should contains as many sig figs as least precise measurement
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velocity vs. time graph displacement
sum up areas with correct signs
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adding/ subtracting with sig figs
as many decimal places as measurement with smallest number of decimal places
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\_____ are always significant
non-zero
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captive zeros \__________ are always
significant
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leading zeros (left of first nonzero digit) are \________ significant
never
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trailing zeros are \______
only significant if decimal in the number
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when in an elevator is moving up but slowing down: acceleartion is
negative
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when an elevator is speeding up and moving up: acceleration is
negative
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when an elevator is going down and speeding up: acceleration is
negative
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when an elevator is going down and slowing down: acceleration is
positive
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true weight \=
absolute value of fg
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when apparent weight is less than true weight acceleration =
positive
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horizontal projectile motion - total displacement \=
pythagorean theorem
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for velocity final in horizontaly launched projectiles\=
find vfy and plug into pythagorean theorem with vfx
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chart for horizontally launched projectile
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for viy and vix with angled launched projectiles
need to plug velocity given into vix and viy formulas
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angled launched projectile chart
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to find max trajectory for horizontal motion
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if trying to find angle measurement with angled launched projectiles
use tan (viy/vix)
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to figure out if something has moved...
the Fax has to be greater than Ffs max
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speed at ymax \=
horizontal velocity
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little g units
m/s squared
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the force of gravity can be the...
centripetal force
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the centripetal force always points...
inside the circle
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velocity for speed and period =
2 pi r / time
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when a car is on a circular path - Fc =
Ffs
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when a ball is in the air - Fc =
Fa by string
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to find the Fg for universal gravitation problems
use large FG formula
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centripetal acceleration units
m/s squared
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centripetal acceleration - maximum possible is
less than sign
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for centripetal acceleration - minimum possible is
greater than sign
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J=
change in p or F x t
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impulse units
kgm/s
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when F and displacement are in same direction
cos 1
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when F and displacement in opposite directions
cos -1
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when F and displacement make 180 degree angle
cos -1
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P (power) =
F x distance / time
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elastic
kf = ki
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inelastic
kf less than ki
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calculate the total momentum
find kinetic energy final
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as something goes up (conservation of energy)
gains potential and looses kinetic
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as something goes down (conservation of energy)
gains kinetic and looses potential
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for roller coaster - to see if it will reach
compare the total energies
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for roller coaster 9.8 is
not negative
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energy unit
Joules
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change in momentum units
kgm/s
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when the apparent weight is more than true weight
acceleration is positive
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what does the scale reflect for elevator forces
normal force
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when the acceleration is going down normal force is
less than weight
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when acceleration is going up fn is
more than weight
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when moving at constant velocity fn \=
weight
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when accelerating upward
upwards acceleration
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when slowing down on way down
upwards acceleration
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when accelerating going down
downward acceleration
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when slowing down on way up
downward acceleration
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when acceleration goes upward you feel
heavier
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when accleration goes downward you feel
lighter
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actual weight on elevator
fg
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remember for free body diagrams add
directions
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for projectile motion - how far down something is \=
y displacement
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displacement y for angle launched projectiles
0
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speed at max heigh \=
vix
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for Fg between two planets use
orbital radius
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T(period) units
sec/revs
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change in momentum / impulse units
kgm/s
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if something is brought to rest
pf \= 0
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dont forget J\=
F x t or change in p
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for roller coasters -to compare kinetic energies
assume comes to rest
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if same angle time and max height \=
same
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coloumbs laws
abs val (add symbol based of fbd)
Note 
Flashcards (125)