You run to your home to a friend's home that is 8 miles away. You then walk home. What was your displacement ? Remember to include the correct units .

Explanation:

0 There was no displacement. That was the point of the question.

You run 8 miles in one direction. You walk - 8 miles on the return to home. You have not moved in terms of displacement. Displacement is distance that has direction.

The distance that you have travelled during the day is 8 + 8 = 16 miles. Distance does not account for direction. That's why your car has gone a distance of more than 0 miles. If the car measured displacement it would always read 0 when you returned home --  kind of a useless piece of information. You would never know when to get  an oil change.

the diagram which shows forces as either balanced = same speed or unbalanced = accelerarting

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this