Solving a Physics Problem | Finding dx and its Magnitude - Answer Included

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The discussion revolves around solving a physics problem related to finding the values of dx and its magnitude. The user expresses uncertainty about their calculations and seeks clarification on their approach. They established a coordinate system with the positive x-axis as east and the positive y-axis as north, indicating that movements to the west and south are negative. The user calculates dx as -181.6 and dy as 72 but questions the correctness of their values after changing bx and cy. The thread emphasizes the need for peer review of the calculations to ensure accuracy.
tinhnho
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hi everyone

please check if i was wrong. And I don't know how to find dx and dx and its magnitude, anyone have any idea? thanks

here the question http://viethost4u.com/toan/physic1.GIF

and here is my answer http://viethost4u.com/toan/answer.GIF
 
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In calculating OA, you established that the positive x-axis was east and the positive y-axis is north. That means that any movement to the west or south is negative.
 
i don't get it ,can you explain which one i did wrong ?thanks
 
i got dx= -181.6 dy= 72, you was right, i have change bx= -400 and cy -188

please check if i 'm wrong

http://viethost4u.com/toan/answer.GIF
 
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