Chapter 5 Section 1 Motion

Motion Reference point – a point used to compare the distance of an object to Motion – when an object changes its position from a reference point Position – measure of length away from a reference point Distance – measure of length traveled along a path from a reference point

Speed Speed – rate at which an object changes its distance distance time

Units miles per hour SI Units

Velocity Velocity – speed + direction Sign indicates direction on a graph: - negative = towards reference point + positive = away from reference point

in real life: - negative = + positive = south, west, down, left north, east, up, right

Resultant Velocity Resultant velocity – total velocity of an object moving within another moving object. 1) Change directions to positive and negative signs 2) Plug numbers into equation 3) Change sign back to direction

Acceleration acceleration – rate at which an object changes its velocity. final velocity initial velocity acceleration time

Units miles per hour per second SI Units meters per second per second =