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PS Chp 11:Kinematics
PS Chapter 11: Kinematics Coach Leach
Term | Definition |
---|---|
mechanics | The study of motion. |
system | A portion of a larger motion that we are interested in studying. |
frame of reference | A coordinate system used to describe the motion of an object. |
kinematics | The study of how things move. |
distance | How far an object moves during a time interval. |
displacement | A vector quantity that describes a change in position. |
speed | A scalar quantity indicating the rate at which an object moves. |
velocity | A vector quantity indicating the rate at which an object's position changes. |
acceleration | The rate of change in velocity. |
scalar | A measurable quantity that consists of magnitude only. |
vector | A measurable quantity with both magnitude and direction. |
momentum | A property of a moving system that is equal to its velocity times its mass. |
free fall | The motion of an object that falls due to gravity alone, with no other forces acting on it. |
circular motion | Movement along a circular path. |
centripetal acceleration | Acceleration that causes an object to move along a circular path. |
projectile motion | The two-dimensional motion of any flying object whose path is determined by the influence of an external force only, such as gravity. |
trajectory | The curved path of a projectile. |