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Two forces, of magnitudes F = 90.0 N and F2 = 40.0 N, act in opposite directions on a block, which sits atop a frictionless surface, as shown in the figure. (Figure 1 )Initially, the center of the block is at position = -1.0 cm. At some later time, the block has moved to the right, and its center is at a new position, f = 6.00 cm.