# Physics Midterm

 a simple physical quantity that is not changed by coordinate direction SCALAR a straight line segment whose length is magnitude and whose orientation in space is direction VECTOR a physical length DISTANCE shortest distance from the initial and final positions DISPLACEMENT distance travelled per unit time SPEED rate of change of position (m/s) VELOCITY change in velocity over time ACCELERATION The speed of an object at one instant of time INSTANTANEOUS SPEED The overall rate of speed at which an object moves AVERAGE SPEED vertical motion of an object falling a small distance close to the surface FREE FALL the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force INERTIA push or pull FORCE force between two objects (or an object and a surface) that are in contact with each other CONTACT FORCE interaction of two objects which are separated in space with no known mediator of the interaction ACTION AT A DISTANCE force resisting the relative lateral (tangential) motion FRICTIONAL COEFFICIENT a vector that is the sum of two or more other vectors RESULTANT Authoryellowfreak516 ID58512 Card SetPhysics Midterm DescriptionVocabulary Updated2011-01-07T05:59:59Z Show Answers