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V=V\omicron+at
When displacement is unknown
instantaneous velocity
\Delta X=\frac12\left(V+V_{\omicron}\right)T
when you dont know acceleration
\Delta X=V_{\omicron}t+\frac12at^2
For when you dont know final speed
V^2=V_{\omicron}^2+2a\Delta X
For when you dont know time
GUESS
Givens
Unknowns
Equation
Solve
Subsitute
Area under velocity/time graph
Is displacement
Area under acceleration graph
Average velocity
How to set up 2 body problems
Use equation
\Delta X=V_{\omicron}T+\frac12at^2
Set one side as your “zero”
Add time or distance to other side, and set velocity negative relative to zero
Set equations equal to each other
Solve for what you need