motion, speed, velocity and acceleration notes
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Motion
SpeedVelocity
Acceleration
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VocabularyMotion: A change in positionDepends on reference point
Is the mom moving relative to the dad? Is the mom moving if you were on the side of
the road?
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SpeedThe distance an object moves in a certain amount of time
Formula:
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Unit for SpeedSince the formula is
Then the unit for speed must be a unit of distance divided by a unit of time.
For example: km/h m/s
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SpeedLook familiar?Knowing any of the 2 variables, you can solve for the 3rd.
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Calculate Speed If you went to a Rihanna concert in
Boston (100 km away) and it took you 2 hours, what was your average speed?
Use the 5 step method List formula List known and unknown values Plug into formula Show the math Circle your answer WITH THE
CORRECT UNIT!
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VelocityHow far an object moves in a
given amount of time AND the direction
+
What was your velocity to the
concert?
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Acceleration
A change in speed OR direction
Speeding upSlowing downChanging direction
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Graphing Speed
Distance (km)
25 50 50 50 100
Time (min)
20 30 40 50 60
Distance (km)
25 50 75 100
125
Time (min)
20 40 60 80 100
Distance (km)
25 40 55 65 75
Time (min)
5 15 30 45 70
Distance (km)
25 50 75 100
125
Time (min)
25 45 60 70 75
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Interpreting GraphsThe shape, or slope, of the
line tells the story!
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Interpreting a GraphNow you try! What does each graph tell you?
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Tell the Story!What story does the graph tell you as you ride your bike to your friend’s house?
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