How do you give an example for finding net force?

- - 6 people all trying to push a car out of snow

- - a Tug-o-War with 30 people of different sizes pulling on each end of the rope

- - you and your sister both pulling on the same doll (or Transformer)

- - lifting a book up from the table to a high shelf

taking a book down from a high shelf to the table

(one force is you; another force is gravity)

- - grabbing your big dog by his collar and trying to bring him inside

- - three people at the table all grab the ketchup bottle at the same time