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a) A velocity vector with an x component of -75 m/s and a y component of 35 m/s

- I found the magnitude by using A= square root of ( Ax squared plus Ay squared ), however I did not get the correct answer for the angle. I used the formula angle = tan -1 ( Ay/ Ax)

b) A force vector with a magnitude of 50 lb that is in the third quadrant with an x component whose magnitude is 40 lb.

- I could not find the correct magnitude and angle with the same formula used in part A.