MCAT physics review Flashcards
how would you calculate the distantce horizatonal from a projectile motion or R range with and angle ?
MCAT high yield
Vt cos@ the range is horizonatal velocity times time in air
What are the big f five equations and what are they missing
MCAT question 1
d=1/2 (vo +vf) t = missing a acceleration
vf^2=vo^2+2ad= missing t
d=vot + 1/2 at^2 missing vf = missing final velocity
d=vft-1/2 at^2 ,ossomg vo = missing intial velocity
Vf=vot + at =missing D
how would one find the maxium height of a projectile motion giving the time angle@ and intial velocity
remember that t is the time for the entire flight of the projectile. If we examine only the second half of the flight the projectile drops from maixum height and starts from an initial velocity of zero in 1/2t seconds
so using the equation x=1/2at^2 but plugging 1/2t for t ,g for a and h for x we have h=1/2a(1/2)^2
how to calculate the vertical velocity of the projectile
answer is always Vsin@ remeber trig function sin = O/H
so oppside side ( from angle) sequals the length of the hypostheiss give you (v) times Sin@
how to calculate the horizontal velocity of projectile
use trigu function lenght of the adjacent side ( horizontal velocty equals the lenght of the hypothenus (v) ties cos
as the angle @ increases from 0to 90 the horizaontal distance R should do what ?
should increase to an maixium at 45 then decrease
just have to memorize
what is sin@ and cos@ 0 to 90
sin 0 =0 sin 30= .50 sin45=.7071 sin60= .866 sin90=
cos cos 0=1 cos 30=.8666 cos45=.7071 cos 60=.50 cos 90=0
how to calculte displacement
displacement = position final - position intial
What does velocity and diplacment tells you
displacement tells how much and objects position changes
velocity tells us how fast and objects position changes
how to calculate velocity ?
To calculate velocity simply divid how much a position has changed by how much time it took for it to change
V= displacement divided time
What the differnce between average velocity and velocity
average velocity displacement is constant and orginal velocity displacment isnt
velocity
spped x diretion
MCAT concept velocity is speed plus directions so it the velocities are the same then speed and the directions are same
total length of pathwasy human circualtor system is on order of 10^8m a typical red blood cells may circulate about 3 meters in one min
what average velcoity
what is the average spped
average velociity is 0 m/s
remember displacement of rbc is 0
average speed is the total distance travel regardless of direction and the sign is always postive so
its 0.05 m/s
average accleration equation
average accleration = change in velocity / time
acceleration tells us how fast and objects veloctiy changes
can an object be acceleration at constant speed?
yes
An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate - the direction of the velocity changes.
