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In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull

any interaction that, when unopposed, will change the motion of an object
https://en.wikipedia.org/wiki/Force

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Speed is a way of measuring how quickly something is moving or being done, or something moving fast. An example of speed is a car being driven 45 miles per hour. An example of speed is someone cleaning a room in 10 minutes.

An object that moves relative to reference point.
http://www.ducksters.com/science/physics/speed_and_velocity.php

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a vehicle's capacity to gain speed within a short time.

The rate of change of velocity of an object with respect to time

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

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the action or process of moving or being moved.

Change of a position of an object.
https://en.wikipedia.org/wiki/Motion_(physics)

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

An object that is used for comparison.
https://en.wikipedia.org/wiki/Reference_point

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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 object, the object stays still or continues moving continues to move at the same speed and in the same direction.

There is balance force on lights.
http://eschooltoday.com/science/forces/balanced-forces.html

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In physics, the Net force is the overall force acting on an object. To calculate net force, the body is isolated and interactions with the environment or other constraints are represented as forces and torques in a free-body diagram.

Forces have two components to them: magnitude and direction
https://msu.edu/~guilesar/netforce/Untitled-1.html

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Average speed can be viewed as the rate of change in distance with respect to time. A car traveling at an average speed of 25 miles per hour covers an average distance of 25 miles every hour.
Average Speed is the speed of your car.
http://study.com/academy/lesson/calculating-average-speed-formula-practice-problems.html

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Static friction is a force that keeps an object at rest. It must be overcome to start moving the object. Once an object is in motion, it experiences kinetic friction. If a small amount of force is applied to an object, the static friction has an equal magnitude in the opposite direction.

The force that was applied was exactly the right amount to overcome static friction.
http://www.softschools.com/formulas/physics/static_friction_formula/30/

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Kinetic friction is a force that acts between moving surfaces. An object that is being moved over a surface will experience a force in the opposite direction as its movement. The magnitude of the force depends on the coefficient of kinetic friction between the two kinds of material.

There is kinetic friction on a flat object
http://www.softschools.com/formulas/physics/kinetic_friction_formula/92/

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

The friction is on the wheel.
https://en.wikipedia.org/wiki/Friction