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Published byDorothy Beverly Kelly Modified over 9 years ago
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Agenda 1) Warm-Up 5 min 2) Homework Check 10 min 3) Review selected HW Qs 10 min 4) D&D Notes 30 min 5) D&D Board notes 6) D&D Lab 30 mins 08 -31- 11 Y-axis HOMEWORK CHECK: Place on your desk: *calculator *orange HW chart *speed & velocity homework (#1-12). I will walk by and check these items.
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1.Velocity: speed with direction 2.Instantaneous speed: Speed at any instant of time 3.Distance: How far something has travelled. 4.Displacement: HOW FAR & in what DIRECTION something is from a starting point
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Linear Motion Distance & Displacement
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DISTANCE AND DISPLACEMENT The motion of objects can be described by the observer’s frame of reference. What is a frame of reference? A person moving relative to something not moving. Distance and Displacement: -Distance (d) is a scalar quantity which refers to “how much ground an object has covered” during its motion -Displacement ( d ) is a vector-quantity which refers to “how far out of place an object is from its original position”; it is the object’s change in position.
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In other words: distance is a scalar quantity & tells you only the magnitude (number sum only) of a path taken; displacement is the shortest distance between the starting point and the end point.
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Distance is a scalar quantity which means it provides simple magnitudes (amounts only). Example: 15 apples or 135 miles Displacement is a vector quantity which means it contains information about the magnitude (size) and direction of a physical observation. Example: 64 miles Southwest
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Vectors contain information about the magnitude (size/amount) and direction of a physical observation. Vectors are typically depicted as arrows drawn with a specific length & pointing in a specific direction. See direction: North is up; South is down; East is right; West is left See examples of the 3 types:
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Position: location of the object at a specific time----used with displacement Why does it matter? Distance vs. Displacement: -Displacement is the shortest directed distance from start to finish -Distance is the amount of ground covered (can be obtained from the odometer in a car)
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DUE TODAY: Distance & Displacement LAB Vocab. Chart (KEEP) Distance & Displacement Notes (KEEP) DUE NEXT CLASS: CALCULATOR Binder/folders/CALCULATOR Review your notes! “ Poetry is man's rebellion against being what he is.” James Branch Cabell
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