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An object of mass 3.80 kg is projected into the air at a 55.0 angle. It hits the ground 3.50 s later. Set up to

An object of mass 3.80 kg is projected into the air at a 55.0° angle. It hits the ground 3.50 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. 

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