Force - a push or a pull on an object, Calculate net force - add forces in the same direction, subtract forces in opposite directions, Balanced forces - equal zero, there is no motion, Unbalanced forces - does NOT equal zero, causes a change in motion (speed/direction), Arrow length - used to show amount of force, Arrow direction - used to show the direction of the applied force, Friction - a force that resists the motion of an object, Texture and mass - two factors that affect friction, Static friction - resistance between objects that are touching, but not in motion, Sliding friction - resistance created when objects slide along each other, Rolling friction - resistance when one object rolls on a surface, Fluid friction - resistance on an object moving through a liquid or gas, Kinetic friction - any resistance between moving objects, Opposite - the direction of force due to friction, Independent variable - the variable that you control, Dependent variable - the variable that changes, is a result , Control - things kept the same in an experiment,

Forces & Friction

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