Physics Ch 3

What is displacement?

Net distance

d = final position - initial position

What is average velocity?

v = d/t

Vector (magnitude and direction)

What is speed?

Magnitude of velocity

Scalar

What is acceleration?

How fast velocity changes

Vector

a = (vf - vi)/(tf - ti)

How do you find displacement when missing acceleration?

d = 0.5 (vi + vf)t

How to find final velocity missing displacement?

vf = vi + at

How to find displacement missing velocity (final)?

d = vi t + 0.5at²

How to find displacement missing velocity (initial)?

d = vf t - 0.5at²

How to find velocity (final) missing time?

vf² = vi² + 2ad

What is the slope of a position vs time graph?

Velocity

What is the slope of a velocity vs time graph?

Acceleration

What is the area under a velocity vs time graph?

Displacement

What is MCAT gravity?

-10 m/s²

In projectile motion, what is horizontal displacement?

x = vox t

vox = v cos theta

In projectile motion, what is vertical displacement?

y = voy t + 0.5(-g)t²

voy = v sin theta

In projectile motion, what is horizontal velocity?

Constant

vx = vox

vox = v cos theta

In projectile motion, what is vertical velocity?

vy = voy + (-g)t

voy = v sin theta

In projectile motion, what is horizontal acceleration?

ax = 0

In projectile motion, what is vertical acceleration?

ay = -g