4.1 Position, Velocity, Acceleration

what is position

s(t)

where an object is located

what is velocity

v(t) = s’(t)

movement of an object (speed and direction)

what is acceleration

a(t) = v’(t) = s’’(t)

movement of velocity

v(t)<0 means

moving left or down

v(t)>0 means

moving right or up

v(t)=0

in rest/not moving

average velocity

[s(b) - s(a)] / b - a

speed equals

| v(t) |

an object is speeding up if

velocity and acceleration are both positive or both negative

an object is slowing down if

both velocity or acceleration is negative and positive

what is displacement

net change in position

end point - start point = displacement

velocity above x axis means

object is going right/up

velocity below x axis means

object is going left/down

a particles acceleration is positive when

the slope of velocity is positive