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# Physics math help. Just so everyone knows, I'm only the guy asking for physics math help.

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An airplane flies 800 km east and 600 km north. What is the total displacement (with approximate direction)? What is the total distance traveled?

Jan 31, 2019

#1
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Total displacement is found using pythagorean theorem

d = sqrt( 800^2 + 600^2) = 1000 km

Direction is given by Tan = opp/adj    =     600/800            arctan (600/800) = 36 .9 degrees

Jan 31, 2019
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Thx so much. I couldn't figure it out.

Guest Jan 31, 2019
#3
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You're welcome....good luck with Physics !

ElectricPavlov  Jan 31, 2019
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For displacement, I was told to subtract the final position - the initial position.

Doing that I got

-200km North

Guest Jan 31, 2019
edited by Guest  Jan 31, 2019
edited by Guest  Jan 31, 2019
#5
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Not sure who told you that, but it is incorrect.....sorry

Hypothetical example:   IF you move 800 east  and then   400 west THEN your displacement would be 800 - 400 = 400       This ONLY works with displacements along a LINE.

ElectricPavlov  Jan 31, 2019
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Thx. I almost messed that up really bad.

Guest Jan 31, 2019