# data[].attributes.body
The skateboarder is pushing with his foot off the ground, which is the action force, causing the reaction force to be the skateboard propelling forward.

# data[].attributes.body
~Definition~

For every action there is an equal and opposite reaction.

~Key Terms~

Action Force: The force acting in one direction.

Reaction Force: The force acting in the opposite direction.

~Questions~

1: If action/reaction forces are equal, do they cancel each other out?

2:What two forces are the result of Newton's Third Law?

# data[].attributes.body
The heavier truck requires more force to move than the smaller car which only requires a small amount of force to move.

# data[].attributes.body
~Definition~

The net force of an object is equal to its mass times acceleration.

~Key Terms~

Net Force: The overall force acting on an object.

Newton: The unit of force.

~Questions~

1: What is the formula for Force?

2: Units of force are measured using...?

# data[].attributes.body
The man was not wearing a seat-belt, so when he crashed, the sudden stop forced himself through the windshield. Since an object has a tendency to resist a change in motion, this carried him forward after the truck has suddenly stopped.

# data[].attributes.attachment_link.title
Man flies through windscreen, lands on his feet

# data[].attributes.attachment_link.description
A truck driver has casually walked away from a horror crash after being thrown through the front windshield.

# data[].attributes.body
~Definition~

An object at rest will stay at rest and an object in motion will stay in motion unless acted upon by an opposing force.

~Key Terms~

Inertia: The tendency of an object to resist a change in motion.

Friction: The resistance that one surface or object encounters when moving over another.

~Questions~

1:Newton's first law is also called...?

2:What does it take to move a "still" object?