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AP Physics 1

Vocabulary Chapter 2

TermDefinition
Displacement A vector quantity that represents the length and direction of a straight line path from one point to another. > The magnitude of displacement is distance.
Kinematics The area of physics that deals with the mathematical methods of describing motion without regard to the forces which produce it.
Acceleration A vector quantity that represents the time-rate of change in the velocity of an object: a= ΔV/t. > The SI unit of acceleration is meters per second squared: m/s^2.
Acceleration Due to Gravity Commonly denoted by the symbol g; it is the same for all objects on Earth, regardless of their mass. >Near the surface of the Earth, the magnitude of g is 9.8 m/s^2.
Average Speed The average of the initial and final speeds of an object: Vav= vf + vi /2. >Speed is the magnitude of the velocity vector.
Average Velocity The average velocity of a uniformly accelerated object may be found by averaging its initial and final velocities. v= vi + vf / s . >Velocity is a vector quantity.
Change in Velocity Any change in the speed or direction of an object's motion; acceleration.
Constant Velocity Uniform unchanging velocity.
Distance A scalar quantity that represents the length of a path from one point to another; the magnitude of the displacement vector.
Final Speed The speed (magnitude of velocity) that an object ends with.
Initial Speed The beginning or starting speed (magnitude of velocity) of an object before there is any change in its speed.
Initial Velocity The beginning or starting velocity of an object before there is any change in its velocity (acceleration or deceleration.)
Speed A scalar quantity that represents the magnitude of velocity. It is the time-rate of change in distance: v=d/t.
Velocity A vector quantity which represents the time-rate of change in the displacement of an object: v=d/t.
Final Velocity The velocity that the object ends with after a change in its initial velocity is made.
Created by: BMcCormack
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