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Three forces with magnitudes of 60, 50, and 40 newtons act on an object at angles of -30, 45 and 135, respectively, with the positive

Three forces with magnitudes of 60, 50, and 40 newtons act on an object at angles of -30, 45 and 135, respectively, with the positive x-axis.

a. find the resultant force.

b. find work that the resultant force performs if the object is moved from (1, 3) to (1, 5)

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