ch05-p070 - angle notation with angles understood to be in...

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70. We are only concerned with horizontal forces in this problem (gravity plays no direct role). Without loss of generality, we take one of the forces along the + x direction and the other at 80 ° (measured counterclockwise from the x axis). This calculation is efficiently implemented on a vector capable calculator in polar mode, as follows (using magnitude-
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Unformatted text preview: angle notation, with angles understood to be in degrees): F net → = (20 ∠ 0) + (35 ∠ 80) = (43 ∠ 53) ¡ | F net → | = 43 N . Therefore, the mass is m = (43 N)/(20 m/s 2 ) = 2.2 kg....
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