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A box of mass m = 3.5 kg (moving in the positive xdirection) has a velocity of 2 m/s at t = 0, and has

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A box of mass m = 3.5 kg (moving in the positive xdirection) has a velocity of 2 m/s at t = 0, and has a velocity of 6.0 m/s at time t = 2.0 s. From t = 0 to t = 2.0 s, a force FE acts on the box in the direction of motion. Find the work done by F1. Express your answer with the appropriate units

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