A Rock Is Dropped from a Height of 828

question 107

Multiple Choice

A rock is dropped from a height of 828.1 meters and falls toward earth in a straight line. In t seconds the rock drops a distance of 4.9t² meters. What is the instantaneous velocity downward when it hits the ground?

• A) 3,360,173.089 meters/s
• B) 127.4 meters/s
• C) 63.7 meters/s
• D) 9.8 meters/s
• E) 26 meters/s

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