1. You are given three vectors of lengths A=65.7, B=38.4, and C=43.7. The angles are theta a=29.1 degree and theta b=57.2 degree, and C points along the negative y-axis. (a) Determine the length of the vector A-B+C. (b) Calculate the angle of this vector(adsbygoogle = window.adsbygoogle || []).push({});

2.

(a) Rx = Ax-Bx+Cx Ry = Ay-By+Cy

(b) R=square root of Rx^2+Ry^2

3.

Rx=(65.7cos29.1)-(38.4cos57.2)+(43.7cos270)

Rx=57.407-20.802+0

Rx=36.605

Ry=(65.7sin29.1)-(38.4sin57.2)+(43.7sin270)

Ry=31.95-32.28-43.7

Ry= -44.03

R=square root of 36.605^2+(-44.03)^2

R=57.26

The HW site says my answers are wrong. Please help me and let me know what I did wrong. My hw is due Saturday.

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# Sum & Angle of Three Vectors (College Physics)

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