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Help solving An object of mass 6.80 kg is projected into the air at a 55.0 angle. It hits the ground 3.40 s later. Set

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An object of mass 6.80 kg is projected into the air at a 55.0 angle. It hits the ground 3.40 s later. Set "up" to be the positive y-direction. What is the y-component of the object's change in momentum while it is in the air? Ignore air resistance kg.m/s

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