Equations of Motion PSC1341 Chapter 2.

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Presentation transcript:

Equations of Motion PSC1341 Chapter 2

Speed and velocity Speed is the distance traveled in a certain amount of time v = d/t Average speed is determined by total distance in total time Avg v = d total/t total Instantaneous speed marks the speed of an object at a given moment in time. 2

Speed Speed = distance/time This equation can be rearranged to solve for distance or time. The speed (v) is the average speed. A scalar quantity is a value that does not have a direction associated with it. A vector quantity has an amount and a direction. Speed is a scalar quantity (25 mph) while velocity is a vector quantity (25 mph to the west). In this class we will measure speed in meters per second. (m/s) 3

Vector Quantities Why do we care? Sometimes direction is important.