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the answer above is for another calculation so plug in you values and derive your answer
Figure out the East-West forces and add them up: ... from F1: 40 cos(60 deg) = 20 ... from F2: -90 ... from F3: F3 cos(theta) Add them up: ... -70 + F3 cos(theta) Set it equal to zero (the ball does not move) ... 70 = F3 cos(theta) Now do the same for the
