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anonymous

  • 4 years ago

An ant is crawling along a straight wire, which we shall call the x axis, from A to B to C to D (which overlaps A), as shown in the figure below. O is the origin. Suppose you take measurements and find that AB is 62.0 cm, BC is 42.0 cm, and AO is 3.00 cm.What is the ant’s position at point B?

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  1. anonymous
    • 4 years ago
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    |dw:1328482924512:dw|

  2. asnaseer
    • 4 years ago
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    where is point C?

  3. anonymous
    • 4 years ago
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    |dw:1328484105023:dw|

  4. asnaseer
    • 4 years ago
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    |dw:1328484223243:dw| so at point B, the ant is 62-3 units away from the origin. i.e. it is positioned at x=59

  5. anonymous
    • 4 years ago
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    do you know how to find the distance and displacement from point c to d

  6. asnaseer
    • 4 years ago
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    C to D would just be 62-42=20

  7. anonymous
    • 4 years ago
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    what is the the displacement from a to d

  8. asnaseer
    • 4 years ago
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    they tell you that A and D overlap - so what do you think the displacement from A to D is?

  9. anonymous
    • 4 years ago
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    -3

  10. asnaseer
    • 4 years ago
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    i.e. how far would you have to travel from A in order to get to D?

  11. anonymous
    • 4 years ago
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    zero

  12. asnaseer
    • 4 years ago
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    correct

  13. anonymous
    • 4 years ago
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    how about the displacement

  14. asnaseer
    • 4 years ago
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    displacement = distance travelled

  15. anonymous
    • 4 years ago
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    so would it be 0

  16. asnaseer
    • 4 years ago
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    thats it - looks like you've mastered this now :)

  17. anonymous
    • 4 years ago
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    thank you. so when ever we want to find the position of the ant we have to think how far away from the orgin is it

  18. asnaseer
    • 4 years ago
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    you are more than welcome. and yes, position is always relative to the origin. displacement is just the distance travelled.

  19. anonymous
    • 4 years ago
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    so they are the same ting. one more thing the displacent from c to d is negattive but the distance is positive . do you know why

  20. asnaseer
    • 4 years ago
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    C to D displacement is negative because you are travelling to the left. moving left to right along the x-axis is positive displacement. moving right to left along the x-axis is negative displacement.

  21. anonymous
    • 4 years ago
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    how about distance

  22. asnaseer
    • 4 years ago
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    distance travelled is always positive.

  23. anonymous
    • 4 years ago
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    distance and displacement are the same thing but in displacement we have to show positive or negative

  24. asnaseer
    • 4 years ago
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    distance and displacement have the same magnitude (i.e. size). distance is always positive and tells you how far you travelled. displacement has a sign that tells you in which direction you travelled.

  25. anonymous
    • 4 years ago
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    great definition

  26. asnaseer
    • 4 years ago
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    I'm glad I was able to help. :)

  27. anonymous
    • 4 years ago
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    :) . when we are asked postion is referring to distance or displacement

  28. asnaseer
    • 4 years ago
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    position is always relative to the origin. so you apply a displacement to where ever you are right now. that will take you either to the left or right of where you are now (depending on the sign of the displacement). where ever you end up, your position is how far you are from the origin.

  29. anonymous
    • 4 years ago
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    can you help me with finding position c

  30. asnaseer
    • 4 years ago
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    we know B is positioned at x=59 (from above) and C is 42cm to the left of this, so C's position is x=59-42=17.

  31. anonymous
    • 4 years ago
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    that what i got too. thanks

  32. asnaseer
    • 4 years ago
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    similarly, A and D's positions are x=-3

  33. asnaseer
    • 4 years ago
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    as they are to the left of the origin O

  34. anonymous
    • 4 years ago
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    oh okay i see.

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