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pokiedokie

  • one year ago

An AC repair technician is trying to find the house he needs to make a repair. He travels 9 km east, then turns around and travels 4 km west and then turns around again and travels 14 km to his destination. a. What distance did he travel? b. What is the displacement? (Remember change in position from beginning to end) please help me out! i'm a bit confused

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  1. anonymous
    • one year ago
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    |dw:1442098653784:dw| a) Distance traveled=number of km he took from all the traveling b)Displacement=ending position- starting position

  2. PokieDokie
    • one year ago
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    so would the number of km be 27? or would i have to subtract 4km because he is moving backwards?

  3. anonymous
    • one year ago
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    Which one a or b?

  4. anonymous
    • one year ago
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    My explanation says it.

  5. PokieDokie
    • one year ago
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    so im guessing "a" is 27

  6. anonymous
    • one year ago
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    And for b?

  7. PokieDokie
    • one year ago
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    14km-9km? or is it 27km-9km? sorry if im being confusing

  8. anonymous
    • one year ago
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    Displacement is final position- initial position Here is an example since you were struggling with A and B I go 14km west, then 17km, west, then 20km east, then 12km west Distance traveled would be the number of km you traveled no matter what direction. It is sorta common sense. Distance traveled when you walk=How many distance did you walk today? No matter if you walk from left to right or right to left or in a circle. So distance traveled=total distance traveled. Its like how many hour slept at Wednesday? So would add 14+17+20+12 up. Displacement cares about direction Your initial position was at 0km. First you went 14km west so you are at 14km west right now from your initial position of 0m Second you went 17km west so you are at 31km west from your initial position of 0m Third you went 20km east, so you are at 11km west of your initial position (31km west-20km east=11km west. Last you went 12km west so you are 23km west of your initial position of 0m So final position is 23km west. Initial position is 0km 23km-0km=23km Direction does not matter when you are writing the units for displacement. Hence it is 23km not 23km west.

  9. PokieDokie
    • one year ago
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    thank you so much!! this makes much more sense to me now

  10. anonymous
    • one year ago
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    Yep, it is pretty confusing at first.

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