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Chapter 10 Vocabulary Acceleration the rate at which velocity changes over time (Δv/t) Balanced forces a state in which the net force acting on an object is zero creating no change in motion Displacement the change in position of an object Distance the actual amount of length traveled or ground covered during a motion Force an action exerted on a body in order to change its state of rest or motion Friction a force that opposes motion between two surfaces in contact Kinetic Friction the force that opposes the movement of two surfaces that are in contact and are moving over each other Motion an object’s change in position relative to a reference point Net force the combination of all forces acting on an object Reference Point a stationary object used to determine if another object is in motion Rolling Friction a type of friction that occurs when objects slide past each other Sliding Friction a type of friction that occurs when round objects roll over flat surfaces Speed the distance traveled by an object divided by the time it took the motion to occur (d/t) Static Friction a type of friction that resists the initiation of motion between two surfaces that are in contact and at rest Unbalanced Forces a state in which the net force acting on an object does not equal zero causing motion to occur in the direction of the greatest force Velocity the speed of an object in a particular direction Peer Tutoring Tracking Sheet As you study, keep track of the words you are getting right and wrong so you will know which ones you will need to spend the most time studying. To do this, place a tally mark beside the words you incorrectly identify during peer tutoring time. The words with the most tallies are the words you will need to spend additional time studying at home. WORD Acceleration Balanced forces Displacement Distance Force Friction Kinetic Friction Motion Net force Reference Point Rolling Friction Sliding Friction Speed Static Friction Unbalanced Forces Velocity TALLY Acceleration Friction Displacement Balanced Forces Force Kinetic Friction Distance Reference Point a force that opposes motion between two surfaces in contact the rate at which velocity changes over time (Δv/t) a state in which the net force acting on an object is zero creating no change in motion the change in position of an object the force that opposes the movement of two surfaces that are in contact and are moving over each other an action exerted on a body in order to change its state of rest or motion a stationary object used to determine if another object is in motion the actual amount of length traveled or ground covered during a motion Motion Velocity Net Force Sliding Friction Speed Rolling Friction Static Friction Unbalanced Forces the speed of an object in a particular direction an object’s change in position relative to a reference point a type of friction that occurs when objects slide past each other the combination of all forces acting on an object a type of friction that occurs when round objects roll over flat surfaces the distance traveled by an object divided by the time it took the motion to occur (d/t) a state in which the net force acting on an object does not equal zero causing motion to occur in the direction of the greatest force A type of friction that resists the initiation of motion between two surfaces that are in contact and at rest