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vector

a quantity that has botth magnitude and direction

scalar

a quantity that has magnitude, but no direction

resultant

the sum of two or more vectors

Pythagorean theorem

a² + b² = c²

θ

angle

tangent

opposite/adjacent

sine

opposite/hypotenuse

cosine

adjacent/hypotenuse

x and y

the two components of a vector

to find the x component of velocity

use v*cos θ

to find the y component of velocity

use v*sin θ

projectile

a thrown or launched object that is given an initial horizontal velocity and is then in freefall

path of projectile

parabolic

regardless of initial horizontal velocity

all projectiles fall at the same rate

horizontal

type of projectile launch that initially has only horizontal velocity

angled

type of projectile launch that has both horizontal and vertical initial velocity