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A cannonball is sitting (at rest) at the bottom of a cannon, which is pointed at...

A cannonball is sitting (at rest) at the bottom of a cannon, which is pointed at a 45- degree angle. The cannon is fired, and the ball flies up to its maximum height. During this process, who does a greater absolute value of work on the cannonball: the cannon or gravity? (Or are the two numbers the same?) Explain your reasoning.

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