What is the term for the force that changes the state of an object at rest or in motion?

Force

Fill in the blank: Balanced forces occur when the resultant of applied forces is equal to ______.

Zero

True or False: Unbalanced forces can change the direction and speed of a moving object.

True

Riddle: I resist changes to my state of motion, and the more mass I have, the harder I am to push. What am I?

Inertia

What does Newton's First Law of Motion state about an object in motion?

An object remains in motion unless acted upon by an external force.

Which of the following best describes unbalanced forces? 

A) Forces that cancel each other out 

B) Forces that do not affect motion 

C) Forces that cause a change in motion 

D) Forces that are equal in magnitude

C) Forces that cause a change in motion

Fill in the blank: The momentum of an object is defined as the product of its mass and ______.

Velocity

True or False: The mass of an object is inversely proportional to its inertia.

False. The mass of an object is directly proportional to its inertia.

What is the SI unit of force as explained in Newton's Second Law of Motion?

Newton (N)

According to Newton's Third Law of Motion, what happens for every action?

There is an equal and opposite reaction.

Fill in the blank: The product of mass and velocity is known as ______.

Momentum

Which law explains why a person falls forward in a bus when it suddenly stops?

Newton's First Law of Motion

Riddle: I am the reason you feel pushed back when a car accelerates, and I'm equal and opposite. What am I?

Reaction force