6. As shown in the diagram, two forces act on an object. The forces have magnitudes F1 = 5.7 N and F2 = 1.9 N. What third force will cause the object to be in equilibrium?
a. 3.8 N at 108° counterclockwise from F1
b. 6.3 N at 162° counterclockwise from F1
c. 6.3 N at 108° counterclockwise from F1
d. 3.8 N at 162° counterclockwise from F1
the answer is B. using the sine rule to get an opposite force similar to that of F1
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