PHYS 115 Chapter Notes - Chapter 2: Amotion
Document Summary
Dynamics: the study of motion and of physical concepts such as force and mass. Kinematics: part of dynamics that describes motion without regard to its causes. The displacement x of an object is defined as its change in position and is given by: x xf. A vector quantity has both a magnitude and a direction. A scalar quantity has magnitude but no direction (e. g. mass and temperature) 2. 2 velocity: speed is a scalar quantity; it only has magnitude, velocity is a vector; it has both magnitude and direction. The magnitude of the average velocity is less than or equal to the average speed. Average speed pathlength elapsed time in meters per second. Or v = d t (v represents average speed) Average velocity: average velocity is a vector quantity. Instantaneous velocity the limit of the average velocity at the time interval t becomes infinitesimally small v lim.
