2m A 3kg 6m For the diagram above: a) How much PE does the hanging block have at point A relative to the floor? b) How much KE does the hanging block have at point A? c) The string is cut and the block falls to the floor. Just as the block hits the floor, what is its PE? d) What KE must the block have as it begins to touch the floor? e) Therefore, what is the speed of the block as it hits the floor