1. Triquarterly Review

2. Mechanics Position – a space an object occupies
Distance/Displacement – a change in position
Speed/Velocity – a change in distance/displacement over time
Acceleration – a change in speed/velocity over time
Force – a push or pull

3. Forces
Net Force – sum of all forces (not drawn on free body diagrams); causes an object to accelerate based on the object’s mass
Friction – opposes motion due to contact between surfaces
Normal – perpendicular to the surface an object rests/moves on
Gravity – attraction between any two objects with mass
Electrostatic – attraction or repulsion between any two objects with charge

4. 2-D (anything with angles)
Value of vector (resultant)
Y-component (vertical) =
Hypotenuse sin θ θ
X-component (horizontal) = Hypotenuse cos θ
Components of vectors are the pieces.
When adding vectors, draw them head to tail.
Use Pythagorean theorem for vectors AT 90° ANGLES.

5. Projectiles
Keep Horizontal Calculations separate from vertical calculations
Horizontal: No acceleration, constant velocity
v=d/t
Vertical: Acceleration due to gravity (9.8m/s2), velocity starts at zero when dropped from a height (unless it is specifically given)
For inclined projectiles, don’t forget to double the time for horizontal calculations! (time up and time down)

6. Circular Motion
Force and acceleration are centripetal (literally means TOWARDS THE CENTER)
Velocity is tangent to circle
To find distance, you need circumference….
v=d/t becomes v=2πr/t, because C=2πr

7. Energy
Work, Potential, and Kinetic are ALL energy, just in different forms.
Friction will cause a loss in energy in the form of heat
Without friction, energy can be fully converted fro potential into kinetic based on the height fallen or speed gained

8. Static Electricity Current Electricity is not on exam
Know how to convert e to C and vice versa
Conduction requires Contact
Induction implies no contact (rearrangement of charge – ex: Balloon on wall)
Neutral objects are attracted to any charged object
Electric Fields are drawn based on what a positive charge would do in the space
Electric Fields are uniform/constant between two charged parallel plates