Any help would be appreciated! I am pretty confused TBH.

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Why does it matter if osmosis is put into a “scab” or a “nosebleed? ” where would that leave him?

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box