A rock is dropped from a height of 88.8 m and falls toward Earth in a straight line. In t seconds the rock falls 4.9t² meters. (a) What is the average velocity of the rock for the first 2 s? 9.8 m/s (b) How long does it take for the rock to hit the ground? (Round your answer to three decimal places.) 4.2 (c) What is the average velocity of the rock during the time it is falling? (Round your answer to two decimal places.) 21.14 x m/s (d) What is the velocity v of the rock when it hits the ground? (Round your answer to two decimal places.) x m/s v 41.88 A

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