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7. David and Goliath: A 22 caliber bullet has a weight of 2.6 grams and an average velocity of 330 m/s. This has enough

7. David and Goliath: A 22 caliber bullet has a weight of 2.6 grams and an average velocity of 330 m/s. This has enough linear momentum to kill Goliath. David can sling a rock with a velocity of 45 m/s. How heavy does the rock have to be for David to be certain that if he hits Goliath the giant will die?

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