15 terms

vocab from the physics chapter about 2D motion

Scalar

a measurement without direction

examples of scalars

50g, 100m/s, 45 lb, speed

Vector

A measurement that includes direction

examples of vectors

100m/s at 30° N, velocity

Acceleration

rate of change in velocity

velocity

rate of change in displacement

Polar Notation

53 m/s at 67° N

Unit Vector Notation

(3i+4j)m

trajectory

path the projectile follows

trajectory-shape

parabola

What component do the horizontal and vertical components of a projectile share?

time

what is a projectile?

Objects that are thrown into the air and subject to gravity

true or false: horizontal speed is affected by vertical acceleration

false

in projectiles fired at an angle,

since they don't affect each other, you can split horizontal and vertical

the parabola is symmetric

g= 9.8 m/s^2 on earth

vx is constant

vy at top of trajectory is o m/s^2

the parabola is symmetric

g= 9.8 m/s^2 on earth

vx is constant

vy at top of trajectory is o m/s^2

why do you get a parabola?

because x is unchanging and y is increasing