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the resistance that one surface or object encounters when moving over another.

This image shows how the bottom block (friction)  encountered resistance when moving over one another.

https://www.google.com/search?q=friction&rlz=1CADEAC_enUS704US705&oq=friction&aqs=chrome..69i57j69i60j69i59l2j69i61l2.1118j0j7&sourceid=chrome&ie=UTF-8&safe=active

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Balance forces are two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an abject, the object stays still or continues moving continues to move at the same speed and in the same direction.

This image shows  the reaction force of the table, and the weight if the metal block.

http://eschooltoday.com/science/forces/balanced-forces.html

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Strength/ energy as an  attribute of physical action/movement.

This picture shows how both sides of the rope is receiving force.

http://www.physicsclassroom.com/class/newtlaws/Lesson-2/The-Meaning-of-Force

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Someone/something is able to move or operate.

In this image, it is shown how the man is moving very quickly, at a high speed.

http://www.dictionary.com/browse/speed

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A change in velocity. Increase in speed of something.

This image shows the different speed of velocity; slow, fast, slow.

http://www.dictionary.com/browse/speed

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Moving or changing place/position.

This image represents when in motion.

https://www.google.com/search?q=motion&rlz=1CADEAC_enUS704US705&oq=motion&aqs=chrome..69i57j69i59j69i60l2j69i61j0.1487j0j7&sourceid=chrome&ie=UTF-8&safe=active

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a basis or standard for evaluation, assessment, or comparison; a criterion.

This image demonstrates how rode signs can be used as a "reference point"

https://www.google.com/search?q=reference%20point&rlz=1CADEAC_enUS704US705&oq=reference%20po&aqs=chrome.1.69i57j0l5.7250j0j7&sourceid=chrome&ie=UTF-8&safe=active

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

This image for example, shows how both sides are receiving force.

http://study.com/academy/lesson/what-is-net-force-definition-magnitude-equations.html

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The average speed of an object in an interval of time is the distance traveled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.

This picture represents how the truck is calculating the average speed.

https://en.wikipedia.org/wiki/Speed

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A friction between two surfaces that are not moving past each other.

For example, this image shows how the man apply pressure to make the box move. If he stops adding force the box will stop.

http://www.softschools.com/formulas/physics/static_friction_formula/30/

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A force that acts between moving surfaces. As an object moves over a surface it experiences a force in the opposite direction as its movement ( this depends on the magnitude of the coefficient between two different materials.

This image demonstrates how the force of the table being pushed is receiving force, as well is the force of the feet movement.

http://www.softschools.com/formulas/physics/kinetic_friction_formula/92/