Help with velocity vs, time graph

AI Thread Summary
To create a velocity vs. time graph for Tommy's car, start with a horizontal line at zero velocity while he waits at the traffic light. As he accelerates, draw a positive diagonal line representing an increase in velocity over time. Once he reaches the speed limit, depict a horizontal line at a constant positive velocity. When he decelerates for the red light, illustrate a downward slope until the velocity returns to zero. Finally, the graph should show a horizontal line at zero again while he stops at the light.
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Homework Statement


Draw a velocity vs. Time graph Please I REALLY need HELP!?
7. Sketch a velocity versus time graph of Tommy in his car for the following situation. [5]

• He is waiting at a traffic light.
• He accelerates up to the speed limit.
• Travels at the speed limit for a while.
• Decelerates when he sees a red light.
• Stops at the light for a while.


Homework Equations


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The Attempt at a Solution



I don't know how to draw this!
I need help
please!
 
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Okay, so if he is waiting at a traffic light, his velocity should=0. Time is still passing, so its a straight line but it sits on top of the x-axis (y=0). When he accelerates, his velocity will raise over time, so that's a positive diagonal line. Now he is cruising at a constant velocity. That's a straight line at some positive value of y. When he decelerates, the line goes downwards (make a negative slope) and it will eventually hit zero, where it will just go along the x-axis again.
 
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