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OpenStudy (anonymous):
a dynamite blast propels a heavy rock straight up with a launch velocity of 160ft/sec (about 109 mph). Write a position for the height of the rock. a. How high does the rock go? b. What is the velocity and speed of the rock when it is 256 ft above the ground on the way up? On the way down? c. What is the acceleration of the rock at any time t during its flight (after the blast)? d. When does the rock hit the ground?
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