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16 terms

Motion in Two Dimensions

These questions cover chapter 3, which is pages 79-103.
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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