Compléter Understanding VectorsVersion en ligne Fill in the blanks with what you know about vectors and scalars. par Devon Heath 1 vectors 25N left scalars trigonometry size direction northeastern right size 15N 25 subtracted added A scalar only has a , while a vector has a + . 15 miles and 10 grams are . 10 meters east and 30 feet down are . When two vectors are facing the same direction and are on the same axis ( both vertical or both horizontal ) they can be to find the sum . When two vectors are facing opposite directions and are on the same axis ( both vertical or both horizontal ) they should be . If two vectors are not on the same axis , you must use to find the sum . If a person pushes an object to the left with 10N of force and someone else pushes an object to the left with 15N of force , the total force is to the . If a person pushes an object to the right with 40N of force and someone else pushes an object to the left with 25N of force , the total force is to the . It a plane flies with a northern velocity of 15 m / s and an eastern velocity of 20 m / s , the velocity of the plane is m / s .