Speed, Velocity and Graphs - FLIPPED OUT SCIENCE ......General Understandings - 1 For distance vs....
Transcript of Speed, Velocity and Graphs - FLIPPED OUT SCIENCE ......General Understandings - 1 For distance vs....
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Speed, Velocity and Graphs
Get colored pencils are multiple colored highlighters if you have them
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Review: Speed vs. Velocity
• Speed describes how fast something travels in a given amount of time
• Velocity is a vector quantity that describes how fast and in what direction and object is moving
• Vector quantities can be shown on diagrams with arrows.
• The length of the arrow represents the relative speed and the direction it is pointing represents the direction of movement
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Reading Graphs
Quick graphing review:
• X axis is the horizontal axis, this is the independent variable
• Y axis is the vertical axis, this is the dependentvariable
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How do you Graph Motion?
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General Understandings - 1
For distance vs. time graphs –
If we look at the graph shown, you can see that the time in hours is along the horizontal, and the distance in miles is on the vertical axis. This graph represents a journey that Jan took, in travelling to Dallas and back, from Austin.
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Distance Time Graphs
• Think of these as “journey” graphs!!
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Watch this video
• Distance – time video: https://www.youtube.com/watch?v=9LQdLDDEJ1g&feature=youtu.be
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Packet:
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Packet Instructions:
• Read and highlight important information in the packet. I will demonstrate what this means.
• Work any “problems” you come across.
• Stop when you get to page 7.
• We will go over this section of the packet together before continuing
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No Motion
• Time is increasing, but distance does NOT change. It is
NOT MOVING…NO MOTION…AT REST.
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CONSTANT SPEED• Time and distance are
INCREASING at a constant rate. This
graph shows CONSTANT
SPEED.
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CONSTANT SPEED
• This graph is the same as above, but shows a change in direction (meaning
the object is headed back to the starting point). This graph
also shows CONSTANT SPEED.
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FASTER SPEED
• A steeper line shows greater
distance traveled in a given time.
The STEEPER THE LINE, the HIGHER THE
SPEED.
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ACCELERATION• In a given time,
the distance the object moves is getting larger, it
is ACCELERATING.
The curve upward shows
an INCREASE in SPEED.
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DECELERATION• This graph is
the same as above, but the
curve downward
shows a DECREASE IN
SPEED or DECELERATION
.
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Putting it all together
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Main Points
• A straight diagonal line shows constant speed.
• A curved line shows average speed.
• A horizontal line shows no motion.
• Time is on the x-axis, distance is on the y-axis.
• The steeper the line, the faster the motion.
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Demo!
• Gizmo Lab Demo:
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Speed/Velocity Time Graphs
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General Understandings - 2
Speed (or velocity) vs. time graphs
• The steeper the gradient of the line (the slope), the greater the acceleration (a bigger change in speed in the same time).
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Speed Graphing Videos
• Speed – Time Graphs
• Distance vs. Time Graphs
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Demo!
• Gizmo Lab demo:
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Packet Instructions:
Speed Graphs section: p. 7 - end
• Read and highlight important information in the packet. Work any “problems” you come across.
• When finished, make sure you have the HW.
• We will go over this section of the packet before continuing
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HW – Juan’s Big Race