SOLUTION: Help for exam practice! Using a scale diagram , sketch and determine the resultant vector a) 7m ( down) and 9 m (left) b) 6km (N55degreesW) and 4 km (E35degreesS) a) I

Algebra ->  Triangles -> SOLUTION: Help for exam practice! Using a scale diagram , sketch and determine the resultant vector a) 7m ( down) and 9 m (left) b) 6km (N55degreesW) and 4 km (E35degreesS) a) I      Log On


   



Question 1169201: Help for exam practice!
Using a scale diagram , sketch and determine the resultant vector
a) 7m ( down) and 9 m (left)
b) 6km (N55degreesW) and 4 km (E35degreesS)
a) I did try these questions but the teacher put up the wrong answers and now i am really confused if i did it right, first one i put on a diagram and solved for r using pyth theorem and got 11.4m
b) i used cosine law and i got 7.2 km

Answer by Solver92311(821) About Me  (Show Source):
You can put this solution on YOUR website!


Your answer for a) is correct. b) is incorrect. N 55° W is 180° from E 35° S, so the resultant vector is the larger magnitude minus the smaller magnitude in the direction of the vector with the larger magnitude.


John

My calculator said it, I believe it, that settles it

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