Sir Dudley the Dextrous is loading cannons on top of the castle's tallest towers in preparation for an expected attack. He slips, and a cannonball of mass $18.0 \mathrm{~kg}$ rolls to the edge of the tower, which has a perfectly horizontal surface, and falls to the ground below. It takes the cannonball $2.65 \mathrm{~s}$ to fall to the ground, and air resistance is negligible. How much work is done by gravity on the falling cannonball? work: During the fall, what is the average power transfer to the cannonball due to the force of gravity? average power:

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