Chapter 9, Section 1 Describing and Measuring Motion. Thursday, February 11, 2010 Pages 282 -- 293. Objectives. Explain when an object is in motion and how motion is relative to a reference point. Calculate an object’s speed and velocity using SI units of distance.
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Thursday, February 11, 2010
Pages 282 -- 293
If the speed of an object does not change.
The speed is the same at all times during its motion.
Objects do not ove at constant speeds for a long period of time.
The total distance is divided by the total time to find the average speed.Constant Speed vs. Average Speed