We will have the following:
**Line 1:
*Displacement:
[tex]\Delta d=28m-0m\Rightarrow\Delta d=28m[/tex]Direction: Forward.
*Time interval:
[tex]\Delta t=20s-0s\Rightarrow\Delta t=20s[/tex]*Velocity:
[tex]v=\frac{28m-0m}{20s-0s}\Rightarrow v=\frac{7}{5}m/s\Rightarrow v=1.4m/s[/tex]**Line 2:
*Displacement:
[tex]\Delta d=52m-28m\Rightarrow\Delta d=24m[/tex]Direction: Forward.
*Time interval:
[tex]\Delta t=60s-20s\Rightarrow\Delta t=40s[/tex]*Velocity:
[tex]v=\frac{52m-28m}{60s-20s}\Rightarrow v=\frac{3}{5}m/s\Rightarrow v=0.6m/s[/tex]**Line 3:
*Displacement:
[tex]\Delta d=52m-52m\Rightarrow\Delta d=0m[/tex]Direction: Neutral.
*Time interval:
[tex]\Delta t=80s-60s\Rightarrow\Delta t=20s[/tex]*Velocity:
[tex]v=\frac{52m-52m}{80s-60s}\Rightarrow v=0m/s[/tex]**Line 4:
*Displacement:
[tex]\Delta d=-20m-52m\Rightarrow\Delta d=-72m[/tex]Direction: Backward.
*Time interval:
[tex]\Delta t=110s-80s\Rightarrow\Delta t=30s[/tex]*Velocity:
[tex]v=\frac{-20m-52m}{110s-80s}\Rightarrow v=-2.4m/s[/tex]