chapter 2 Flashcards
what is position?
location of an object w/r to a reference point
x,y,z
what is displacement?
overall change in position
Δx
x-x0 (final-initial)
what is distance?
total length travel
what is average speed?
d / Δt or d / t
what is average velocity?
rate at which position changes
Δx / Δt
what is intantaneous velocity?
rate at which postion changes over a very short amount of time
dx / dt at a certain point
what is instantaneous speed?
velocity without direction (without -)
what is average acceleration?
rate at which velocity changes
Δv / Δt
what is instantaneous acceleration?
rate at which velocity changes over a very short amount of time
dv / dt at a certain point
what is motion at constant velocity?
position increases at a steady/constant rate, no acceleration
how do you calculate acceleration (graphically)?
draw a tangent line at the point on the velocity time graph. find the slope of the tangent line at that point ( Δy/ Δx)
how do you calculate velocity (graphically)?
draw a tangent line at the point on the position time graph. find the slope of the tangent line at that point ( Δy/ Δx)
