Quick recap of Force Problems

1. Write down knowns + unknowns

2. Draw a picture

3. Choose a coordinate system

+ Usually x is horizontal, y is vertical

+ For ramps choose x to be down the ramp and y to be perpendicular to the ramp

Quick recap of Force Problems

1. Write down knowns + unknowns

2. Draw a picture

3. Choose a coordinate system

+ Usually x is horizontal, y is vertical

+ For ramps choose x to be down the ramp and y to be perpendicular to the ramp

Method for Solving Kinematic Equations

Draw a picture!

Write down every variable you

*know*, and every variable you*don’t know / want to find*. Sometimes known variables are super obvious (e.g. if a ball is launched horizontally, then you know that its starting y-velocity, v_y0 = 0)

A *vector* is just an arrow from the origin to a point. It has *magnitude* (how big it is) and *direction* (which way it’s pointing). A variable will have an arrow above it if it’s a vector!

Vectors can be in any number of dimensions

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