Express force F as a Cartesian vector; then determine its direction an – McqOptions

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1.	Express force F as a Cartesian vector; then determine its direction angles.
A.	<b>F<b></b> = (-2<b>i<b></b> +<b>j<b></b>+2<b>k<b></b>) kN, <sub><img src="/_files/images/engineering-mechanics/alpha.png"></sub> = 48.2 , <sub><img src="/_files/images/engineering-mechanics/beta.png"></sub> = 70.5 , <sub><img src="/_files/images/engineering-mechanics/gamma.png"></sub> = 48.2 </b></b></b></b>
B.	<b>F<b></b> = (-2<b>i<b></b> +<b>j<b></b>+2<b>k<b></b>) kN, <sub><img src="/_files/images/engineering-mechanics/alpha.png"></sub> = 131.8 , <sub><img src="/_files/images/engineering-mechanics/beta.png"></sub> = 70.5 , <sub><img src="/_files/images/engineering-mechanics/gamma.png"></sub> = 48.2 </b></b></b></b>
C.	<b>F<b></b> = (-4<b>i<b></b> +<b>j<b></b>+4<b>k<b></b>) kN, <sub><img src="/_files/images/engineering-mechanics/alpha.png"></sub> = 48.2 , <sub><img src="/_files/images/engineering-mechanics/beta.png"></sub> = 70.5 , <sub><img src="/_files/images/engineering-mechanics/gamma.png"></sub> = 48.2 </b></b></b></b>
D.	<b>F<b></b> = (-4<b>i<b></b> +2<b>j<b></b>+4<b>k<b></b>) kN, <sub><img src="/_files/images/engineering-mechanics/alpha.png"></sub> = 131.8 , <sub><img src="/_files/images/engineering-mechanics/beta.png"></sub> = 70.5 , <sub><img src="/_files/images/engineering-mechanics/gamma.png"></sub> = 48.2 </b></b></b></b>
Answer» C. <b>F<b></b> = (-4<b>i<b></b> +<b>j<b></b>+4<b>k<b></b>) kN, <sub><img src="/_files/images/engineering-mechanics/alpha.png"></sub> = 48.2 , <sub><img src="/_files/images/engineering-mechanics/beta.png"></sub> = 70.5 , <sub><img src="/_files/images/engineering-mechanics/gamma.png"></sub> = 48.2 </b></b></b></b>

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