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13 Jul 2020

A cannonball thew a ball directly upward. Angelica has a speedometer and recorded that the initial velocity of the ball was about . Isaac was holding a stopwatch and recorded that the time it took for the ball to reach the ground was . Isaac bet that the ball had reached its maximum height before second. Angelica bet that it's not possible and bet that it reached its maximum height after second. Who won the bet? Apply Rolle's Theorem.

Hint: Assume that the ball was thrown from the ground. Use the formula where acceleration due to gravity is and  is the initial velocity and height from the ground, respectively.

 

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Zhen Zhu
Zhen ZhuLv5
13 Jul 2020

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