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06-17-2010, 04:29 PM
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The lighter puck will start off faster. Although you should be able to apply more force to the heavier puck, it will not likely be proportional to the greater weight (mass).

So leaving the stick the lighter puck will have greater velocity.

However, the heavier puck should have more momentum, and more kinetic energy. Since drag of the pucks will be the same at any given speed (while in the air, approximately in proportion to the square of their speed), assuming they are shot the same way, so the heavier puck will hold it's speed longer and should overtake the lighter puck.

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