Reference point Used to determine the motion and position of an object; Positive Speeding up does not move; can refer back to acceleration Negative Speeding down Motion The state at which one object’s distance from another is acceleration changing Input Force being used Distance The length covered by an object in motion; measured in meters (m) Output Force created Speed How long it takes an object to cover a distance; speed = Directly Changing and/or increasing and decreasing together; in distance / time; measured in seconds (s) proportional motion together; follows same pattern Velocity The measurement of speed and direction Indirectly Changing and/or increasing and decreasing separately proportional Average speed Total distance traveled/ total time taken to travel the dis- tance Slope The steepness of a line on a graph, equal to its vertical change divided by its horizontal change. Constant speed Non acceleration; remaining at the same speed for an entire distance Newton A unit of measure that equals the force required to acceler- ate 1 kilogram of mass at 1 meter per second per second. Force A push or pull exerted on an object; measured in Newtons (N) Net force The overall force on an object when all the individual forc- es acting on it are added together. Balanced forces Forces that cause no movement; cancels each other out; all forces that has the same amount of force (N) momentum The product of an object’s mass and velocity. Unbalanced Forces that cause motion; unequal amount of forces (N) forces Law of The rule that in the absence of outside forces the total Conservation of Mass The amount of matter in an object. momentum of objects that interact does not change. Momentum Friction Force that acts to oppose movement; slows down or stops Weight The force of gravity on an object at the surface of a Oppose Slow down; go against planet. Resist Not affected by an action Gravity Forces that attracts all objects to Earth Magnetic Attracts and opposes metallic substances Inertia The tendency of an object to resist any change in its motion/rest .