A force that acts in the opposite direction of the object's motion is

• gravity

• friction

• inertia

• mass

An object's tendency to resist a change in motion.

• gravity

• force

• inertia

• friction

If an object in motion is not acted on by an unbalanced force, it will continue with the same speed and direction.

• True

• False

Objects with more mass (or heavier) have more inertia; thus,  EASIER to move or stop.

• True
• False

The SI units for force are...

• Kilograms
• Newtons
• Meters per second
• Pounds

The sum of all the forces that act on an object

• vector force
• zero
• magnitude
• net force

An object's resistance to changing motion is called ________________.

• stopping

• starting

• inertia

• motion

Which has more Inertia?

• a skateboard

• a cat

• an ant

• a truck

What kind of objects have inertia?

• all objects with mass

• only objects in motion

• only objects at rest

• only objects whose motion is being changed

Which type of force will cause an object to change motion?

• balanced force

• unbalanced force

• gravity force

• normal force