Just a few questions - calculating the average speed and John's speed

[Elapsing]

Normally I would ask my teacher, but since we had the day off and it's due the day we get back, I can't question him.​

Homework Statement

What is the difference between calculating the average speed and John's speed (questions g and f)? and how do you find displacement for a distance-time graph (question f), do you just add all the sections where John is moving or do you do the whole journey?

Homework Equations

Speed = distance divided by time.
Displacement = velocity multiplied by time.

The Attempt at a Solution

I have only attempted f, because I just want to the know the difference between question g and f.
25+7=32-32=0.

Thanks in advance.​

 

[LeonhardEu]

In g, john's speed is the weighted mean of his speed in the different parts of his journey.
In h, john's average speed in the whole journey is the total displacement divided by the time of the journey.

 

[Elapsing]

In g, john's speed is the weighted mean of his speed in the different parts of his journey.
In h, john's average speed in the whole journey is the total displacement divided by the time of the journey.

Thank you for clearing up the difference, it is definitely appreciated.

 

[adjacent]

You could have posted an upright image.My head is broken now.

 

[Elapsing]

You could have posted an upright image.My head is broken now.

I'm sorry, I thought it was upright when I took it, but I think Tinypic must of changed it.