Kinematics

Question 1

Average speed

Answer 1

total distance divided by total time of travel V[av] = d/Δt

Question 2

Average velocity

Answer 2

total displacement divided by total time for the change V[av] = Δd/Δt

Question 3

How to switch between d-t, v-t, and a-t graphs?

Answer 3

from dt -> vt -> at: find slope, from at -> vt -> dt: area under graph

Question 4

Solve non-right angle triangle

Answer 4

Use c^2 = a^2 + b^2 -2abcosC or sine law *but remember when using sine law, check final angle

Question 5

3 Ways to add vectors

Answer 5

scale diagram, trig, vector components

Question 6

Steps to add using components

Answer 6

Clearly define an “x + y” direction
Find the x + y components for each vector
Add all x components, add all y components
Find the final magnitude+direction using right angle trig

Question 7

Projectile Motion

Answer 7

Horizontal: uniform motion, Vertical: 5 a formulas

Question 8

How to solve range problems?

Answer 8

Δx = (V1 / g)sin2ϴ only on even ground (same start and end elevation)

Question 9

Frame of Reference and Relative Velocity

Answer 9

Use subscripts to clarify the object and frame of reference.

Question 10

Mass from a Force vs Acceleration graph?

Answer 10

Slope