blackstreet23
  • blackstreet23
Which of Juliette's statements is not a true statement about a position vs. time graph? 1- "A steeper slope means a higher average velocity (faster motion)." 2- "A horizontal line has zero slope. Therefore, a horizontal line on the position vs. time graph means that the average velocity is zero." 3- "The sign of the slope gives the sign of the average velocity and, therefore, the direction of motion." 4- "A horizontal line has infinite slope. Therefore, a horizontal line on the position vs. time graph means that the average velocity is zero."
Physics
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SOLVED
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schrodinger
  • schrodinger
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blackstreet23
  • blackstreet23
@Shalante
blackstreet23
  • blackstreet23
I am doing my physics homework right now
blackstreet23
  • blackstreet23
I know the 4th one makes no sense. I mean a horizontal slope does not mean that it is infinite

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More answers

blackstreet23
  • blackstreet23
it means 0 slope. But some others make no sense either
blackstreet23
  • blackstreet23
@abhisar
blackstreet23
  • blackstreet23
But could you explain to me why it could not be the other ones? It is just they are confusing :/
blackstreet23
  • blackstreet23
Did you erase it?
anonymous
  • anonymous
I got confused. I did not read it correctly.
blackstreet23
  • blackstreet23
ohh ok no problem :)
blackstreet23
  • blackstreet23
so that one is false too?
blackstreet23
  • blackstreet23
It asks me for the statement that is not true
anonymous
  • anonymous
Oh no wonder I was confused because I know that A and B are true. C might be true.
anonymous
  • anonymous
D is obviously false. A horizontal line always have a slope of zero.
anonymous
  • anonymous
The question should be phrased "Which of Julitte statement is false?" instead
anonymous
  • anonymous
I saw a true lol and I thought it was asking for true.
blackstreet23
  • blackstreet23
So D is false?
anonymous
  • anonymous
Yea thats what I said.
blackstreet23
  • blackstreet23
yuhu! yeah that was the correct one !
blackstreet23
  • blackstreet23
but could you explain to me why the other ones are false?
blackstreet23
  • blackstreet23
i mean true, sorry
anonymous
  • anonymous
Yes. "The sign of the slope gives the sign of the average velocity and, therefore, the direction of motion." |dw:1442024369802:dw|
anonymous
  • anonymous
Average velocity formula vf-vi/2 If slope is decreasing vf would be less than vi. A (lesser number - greater number)/2= negative number Slop decreasing is a negative number and so does the average velocity.
anonymous
  • anonymous
|dw:1442024673281:dw| V=d/t V=0/10 V=0
Abhisar
  • Abhisar
|dw:1442027405040:dw|
Abhisar
  • Abhisar
When the the curve is horizontal angle x=0 and hence tan 0 = 0. Therefore velocity which is equal to the slope of position-time graph is also zero.
blackstreet23
  • blackstreet23
Thanks a lot to take the time to answer me!

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