Correct answer only !

which situation is an example of not doing work?

W = F x d

Lifting a couch requires a force to displace the couch a certain distance

Throwing a baseball requires a force to be applied to the base ball for it to travel a certain distance

Running up stares requires work against gravity for you to reach the top of the stairs (displacement)

Carrying a box requires no force on the box, so therefore no work is done.

dopamine..

"it was found that some people who were taking the drug l-dopa to raise their levels of dopamine were developing schizophrenic-like symptoms supporting research a strength of the dopamine hypothesis is that there are many studies which have shown support for the neurochemical explanation."

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this