Puzzler #3. Two Cannon Balls

Two identical cannons are aimed directly at each other. The only difference is that the cannon on the left is at the top of a cliff and shooting downward, the one on the right is aiming up.  Disregarding air resistance, what will happen if the perfectly aligned charges are fired simultaneously and at the same speeds?

Concepts involved:

  • push force, pull force, air resistance, gravity.

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