Question

Can someone please help me to do line number 123 and four and the displacement include the direction time interval for each interval and the velocity thank you

Answer 1

We will have the following:

**Line 1:

*Displacement:

`\Delta d=28m-0m\Rightarrow\Delta d=28m`

Direction: Forward.

*Time interval:

`\Delta t=20s-0s\Rightarrow\Delta t=20s`

*Velocity:

`v=(28m-0m)/(20s-0s)\Rightarrow v=(7)/(5)m/s\Rightarrow v=1.4m/s`

**Line 2:

*Displacement:

`\Delta d=52m-28m\Rightarrow\Delta d=24m`

Direction: Forward.

*Time interval:

`\Delta t=60s-20s\Rightarrow\Delta t=40s`

*Velocity:

`v=(52m-28m)/(60s-20s)\Rightarrow v=(3)/(5)m/s\Rightarrow v=0.6m/s`

**Line 3:

*Displacement:

`\Delta d=52m-52m\Rightarrow\Delta d=0m`

Direction: Neutral.

*Time interval:

`\Delta t=80s-60s\Rightarrow\Delta t=20s`

*Velocity:

`v=(52m-52m)/(80s-60s)\Rightarrow v=0m/s`

**Line 4:

*Displacement:

`\Delta d=-20m-52m\Rightarrow\Delta d=-72m`

Direction: Backward.

*Time interval:

`\Delta t=110s-80s\Rightarrow\Delta t=30s`

*Velocity:

`v=(-20m-52m)/(110s-80s)\Rightarrow v=-2.4m/s`