Physics unit 2 quiz 1

2-D motion or projectile motion

Object of two different components of velocity. 2 directions

in answer need above magnitude and direction

What is the vertical velocity at the top of our path?

0m/s

What is the acceleration of the vertical direction?

-9.8m/s²

Leave and land at the same height

• Forms arc

• displacement is zero

• time to max is half of total time

• Velocity initial is equal to velocity final

Lena above where you started

• Time to go up is bigger than time to go down.

• Velocity initial is greater than velocity final.

land below where you started

• Time to max is less than time total

• velocity initial Is less than velocity final

Total velocity

When question just ask for velocity have to find horizontal and vertical average 

do this by Pythagorean theorem

Acceleration in horizontal direction

0m/s²

Common factor between horizontal and vertical direction

time

when Factors are missing

Make triangle and use sine, and cosine

Always use this equation when dealing with horizontal or vertical direction

d = vi(t) + 1/2(a)(t)²v

Important equations

v = d/t

a = (vf-vi)/t

v = (vf + vi)/2

d = 1/2(vf + vi)t

d = vi(t) + 1/2(a)(t)²

vf = vi + at

vf² = vi² + 2ad