Three forces with magnitudes 70 pounds, 100 pounds and 20 pounds act on an object at angles 50°, -40°, and 110° respectively, with the positivex-axis. Find the direction and magnitude of the resultant force. (The choices below are given to two decimal places.)
?
A. 122.90 pounds at an angle of 85.94° with the positive x-axis
B. 115.05 pounds at an angle of -4.06° with the positive x-axis
C. 115.05 pounds at an angle of 85.94° with the positive x-axis
D. 122.90 pounds at an angle of 4.06° with the positive x-axis
E. 115.05 pounds at an angle of 4.06° with the positive x-axis
Answer: E
Mathematics
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