Chapter 18

Question 0

average speed

Answer 0

equals the total distance traveled divided by the total Tim taken to travel the distance

Question 1

speed

Answer 1

equals the distance traveled divided by the time it takes to travel that distance

Question 2

instantaneous speed

Answer 2

the speed of an object at one instant of time

Question 3

velocity

Answer 3

speed and direction of a moving object

Question 4

acceleration

Answer 4

equals the change in velocity divided by the time for the change bro take place; cuts when an object speeds up, slows down, or turns

Question 5

mass

Answer 5

amount of matter in an object

Question 6

inertia

Answer 6

tendency of an object to resist a change in its motion

Question 7

momentum

Answer 7

a measure of how difficult it is to stop a moving object; equals the product of mass and velocity

Question 8

law of conservation of momentum

Answer 8

states that the total momentum of objects that collide with each other is the same before and after collisions