Newton's 1st & Net Force

When two equal forces act in opposite directions on an object, they are called ______________________.

• frictional force

• balanced force

• centripetal force

• gravitational force

When an unbalanced force acts on an object, the force ______________________.

• changes the motion of the object

• is cancelled by another force

• does not change the motion of an object

• is equal to the weight of the object

The resistance of an object to any change in its motion is called ______________________.

• inertia

• friction

• gravity

• weight

Any push or pull on an object.

• force
• velocity 
• inertia
• momentum

A Newton is a unit of...

• force
• inertia
• acceleration
• velocity

When all the forces on an object are equal and opposite, & the net force is zero, that's...

• balanced forces
• unbalanced forces
• terminal velocity
• reaction forces

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

• net force
• action force
• reaction force
• balance force

Only one force can act on an object at a time.

• True

• False

A change in speed or direction; a change in velocity

• Acceleration

• Force

• Inertia

• Net force

The tendency for an object's motion to remain unchanged:

• Newton's 3rd Law

• Unbalanced Force

• Gravity

• Inertia