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Motion cpt. 5

motion

QuestionAnswer
what is motion? an object's change in position relative to a reference point
what is acceleration? the rate at which velocity changes over time
what is net force? the combination of all of the forces acting on an object
forces exerted in the same direction is combined by adding
force exerted in the opposite is combined by subtracting
One of the ways to reduce friction is use rollers,wheels,etc or lubricants
Kinetic friction is.... friction between two moving surfaces
Static friction is... force applied to an objectis not enough to cause an object to move
One of the ways to increase friction is make the surfaces rougher or increase the force pushing the surfaces together
Friction is a force that opposes motion between two surfaces that are in contact
Unbalanced forces will produce a _______ in motion change
Force is expressed in ... newtons
What is constant speed? speed that does not change
What is average speed? total distance/total time
Acceleration is expressed in ... distance/time/time or m/s/s