Chapter 3

Question 1

An objects change in postition relative to a reference point

Answer 1

motion

Question 2

the distance tracewled divided by the time interval during which motion occured

Answer 2

speed

Question 3

the speed of an oject in a particular direction

Answer 3

velocityq

Question 4

ithe rate at which velocity changes over time; an object accelerates if its epeed, direction, or both change

Answer 4

acceleration

Question 5

a push or pull exerted on an object in order to chamge the motion of the objcet;forec has size and direction

Answer 5

force

Question 6

the si unit for force (symbol (N))

Answer 6

newton

Question 7

the combination of all the forces acting on an object

Answer 7

net force

Question 8

a force that opposes all motion between two surfaces that are in contact

Answer 8

friction

Question 9

a force of attraction between objects that is due to their masses

Answer 9

gravity

Question 10

a measure of the gracitational force exerted on anobject; its value can change with the location of the universe

Answer 10

weight

Question 11

a measure of the amount of matter in an object

Answer 11

mass