Vocabulary

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Vocabulary

• Distance
• Velocity
• Speed
• Average Speed
• Displacement
• Acceleration
• Scalar
• Vector

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Distance Displacement

• Page 3 in your comp book

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Displacement vs. Distance

• DISTANCE
• the COMPLETE length of the PATH traveled by a
  moving object
• DISPLACEMENT
• the length of the STRAIGHT LINE PATH from a
  moving objects ORIGIN to its FINAL POSITION

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Scalar vs. Vector

• SCALAR
• A measured quantity that has NO DIRECTION
• Examples
• Distance, Time, Mass, Volume
• VECTOR
• A measured quantity that HAS DIRECTION
• SIGN SHOWS DIRECTION
• Example
• Displacement

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One more thing

• What is the Pythagorean Theorem?
• A2 B2 C2

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Examples
Sign of displacement refers to the direction the
object is moving .
A ball rolls 5 meters north. Distance
Displacement
A cat runs 8 meters west. Distance
Displacement
A bird flies 5 meters north, then 7 meters
south Distance Displacement
5 m
8 m
12 m
5 m
-8 m
-2 m
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Example

• A man drives his car 3 miles north, then 4 miles
  east.

4 mi East
Distance 7 mi
3 mi North
Displacement 5 mi Northeast
What distance did he travel?
What is his displacement from his point of origin?
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Brain Break

• Vector

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Velocity vs. Speed

• VELOCITY
• change in DISPLACEMENT occurring over TIME
• MAGNITUDE and DIRECTION
• VECTOR
• SPEED
• change in DISTANCE occurring over TIME
• MAGNITUDE ONLY
• SCALAR

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How to work a problem

• G given
• U Unknown
• E Equation
• S Substitute
• S - Solve

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Question 1

• What is the speed of a cheetah that travels 112m
  in 4s?
• G-U-E-S-S-

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• Graphing Speed Velocity

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Average Velocity
What does this remind you of?
SLOPE OF A GRAPH!
What is happening in this graph?
INCREASING SLOPE
Moving with CONSTANT positive velocity
Moving with INCREASING velocity
Motionless Object
CONSTANT POSITIVE SLOPE
CONSTANT ZERO SLOPE