How Do You Describe An Object’s Position?Scalars and Vectors Author ALLISON GAMZON Created Date...
Transcript of How Do You Describe An Object’s Position?Scalars and Vectors Author ALLISON GAMZON Created Date...
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How Do You Describe An Object’s Position?
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Where is the treasure?
Come up with at least 3 ways to communicate
this information!
Write them on your white boards!
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What’s the difference?
Distance
Displacement
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In Physics, an object’s position can be described using the following terms.
Classify our treasure locations as either distance or displacement.
Distance Displacement
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Classifications
All quantities can be categorized as either a scalar or a vector.
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What’s the difference?
Scalar - Quantity with a magnitude only.
Vector - Quantity with a magnitude and direction.
Which of our quantities is a vector?
Distance Displacement
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Brain Dump!On your white boards, identify all the different physics quantities you know!
mass
speed weight
velocity
acceleration force
energy
momentumtorquetemperature
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Which Ones are Vectors?
Circle the quantities that are vectors!
mass
speed weight
velocity
acceleration force
energy
momentumtorquetemperature
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Vector Properties
A vector can be drawn anywhere in space!
Which vector is shown twice?
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Vector Properties
We can change the magnitude or direction of a vector by multiplying by a constant.
a x 2 a2a
a x -2 a
-2a
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A More Direct Path!
The directions that your wrote to go straight to the treasure is the sum of all of your vectors.
Known as the resultant!
a +b = a
b
R
Vector resultants are found by drawing vectors tip to tail!
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Analytical Pirates
Given the directions, you could determine the treasure’s location before you even left the boat!
Let’s put our pirate hats back on a figure it out!
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Which is more reliable?
Analytic Method Graphical Method
Do you want more practice?