Newton's First Law of Motion

A force is a ________________________ that acts on an object.

• push

• pull

• push or pull

A force that opposes, or pushes back against, an object moving past another object

• gravity

• friction

• inertia

• mass

The tendency of an object to resist change in motion.

• Force
• Motion
• Friction
• Inertia

Objects with more mass or heavier have LESS inertia.

• True
• False

Lighter objects have LESSER inertia than heavier objects.

• True
• False

According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will

• remain in motion.
• eventually come to a stop.
• change its momentum.
• accelerate.

The ______of an object tends to make the object resist being set into motion.

• mass
• force
• motion
• unbalanced forces 

Without a force to stop or slow a coasting object, the object will coast forever in a ______ line. 

• blue
• red
• straight
• vertical 

What kind(s) of objects have inertia?

• all objects with mass
• only objects at rest
• only objects in motion
• only objects whose motion is being changed

The law of inertia (Newton’s First Law) applies

• to both moving and nonmoving objects
• only to moving objects
• only to objects that are not moving