9-A

Question 1

Occurs whenever an object speeds up, slows down, or changes direction

Answer 1

acceleration

Question 2

the change of an object’s position

Answer 2

motion

Question 3

the speed and direction of a moving object

Answer 3

velocity

Question 4

a force that keeps objects from moving against other objects

Answer 4

friction

Question 5

determined by the mass and velocity of an object

Answer 5

momentum

Question 6

Understand the First Law of Motion

Answer 6

An object tends to stay at the same velocity unless another force causes it to change

Question 7

Understand the Second Law of Motion

Answer 7

Force is equal to the mass of an object and its acceleration

Question 8

Understand the Third Law of Motion

Answer 8

When on object exerts a force on another object, the second object reacts by exerting an equal force back on the first object

Question 9

Which law of motion is being used: Ruth used less force when she threw the baseball to home plate than she used when she went bowling

Answer 9

Second Law of Motion

Question 10

Which law of motion is being used: Dad had to slam on the brakes when a small child darted out in front of our car. My sister’s doll had been in the back seat, but ended up in the front seat

Answer 10

First Law of Motion