Lesson 1: Describing Motion and Force - Darrell Bolin | Library

2

To know if something is in motion you have to have a _______.

2

An object is in _______ if its position changes when compared to another object.

2

A place or object used for comparison to determine if something is in motion is a _______.

2

Motion is relative.

2

A _______ is a push or pull.

2

The SI unit for the strength of a force is called a _______.

2

_______ is a contact force that two surfaces exert on each other when they rub against each other.

4

Forces can be described as either _______ or _______.

2

_______ is the force that pulls objects towards each other as a result of their masses.

6

The three types of noncontact forces are _______ ,_______, and _______.

2

The _______ on an object is the combination of all forces acting upon that object.

2

A _______ net force acting on an object causes a change in the object's motion.