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

why do you get a parabola?
because x is unchanging and y is increasing