15 terms

# Physics-Scalars, Vectors, and Projectiles

vocab from the physics chapter about 2D motion
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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