Chapter 1 Book 2

Question 1

Motion

Answer 1

An object’s change in position relative to a reference point

Question 2

Speed

Answer 2

The distance traveled divided by the time interval during which the motion occurred.

Question 3

Velocity

Answer 3

The speed of an object in a particular direction

Question 4

Acceleration

Answer 4

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

Question 5

Force

Answer 5

A push or pull exerted on an object in order to change the motion of the object ; force has size and direction

Question 6

Newton

Answer 6

The SI unit for force

Question 7

Net Force

Answer 7

The combination of all of the forces acting on an object

Question 8

Friction

Answer 8

A force that opposes motion between two surfaces that are in contact

Question 9

Gravity

Answer 9

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

Question 10

Weight

Answer 10

A measure of the gravitational force exerted on an object, its value can change with the location of the object in the universe

Question 11

Mass

Answer 11

A measure of the amount of matter in an object