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A cannonball is fired straight up at 50 ms Neglecting air resistance when it returns to its starting point its speed is?
Wiki User
∙ 15y ago
50m/s.
The kinetic energy (movement energy) of the ball when it leaves the gun is gradually converted into gravitational potential energy as it moves up and slows down. Eventually it reaches its highest point and stops. It has zero kinetic energy, all the energy has been converted into gravitational potential. The ball then starts to fall under gravity. The gravitational potential energy is converted back into kinetic energy. No energy is lost so the ball arrives back where it started with the same kinetic energy it left with or to put it another way at the same speed it left.
If you do not ignore air resistance it arrives back a bit slower and the physics gets much much more complicated..........
Wiki User
∙ 15y ago
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