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Two men decide to use their cars to pull a
truck stuck in mud. They attach ropes and
one pulls with a force of 515 N at an angle
of 31◦ with respect to the direction in which
the truck is headed, while the other car pulls
with a force of 926 N at an angle of 25◦ with
respect to the same direction. What is the net forward force exerted on
the truck in the direction it is headed?