A heavy rock is thrown straight up with a velocity of 160 ft/ sec. The of S= 160t - 16t2 ft after t sec. Find: i. How high does the rock go? ii. What are the velocity of the rock when it is 256 ft above the ground on the way up? iii. What is the acceleration of the rock at any time t?

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Chapter2: Kinematics
Section: Chapter Questions
Problem 47PE: (a) Calculate the height of a cliff if it takes 2.35 s for a rock to hit the ground when it is...
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B. A heavy rock is thrown straight up with a velocity of 160 ft/ sec. The rock reaches a height
of S= 160t - 16t2 ft after t sec. Find:
i. How high does the rock go?
ii. What are the velocity of the rock when it is 256 ft above the ground on the way up?
iii. What is the acceleration of the rock at any time t?
iv. When does the rock hit the ground again?
Transcribed Image Text:B. A heavy rock is thrown straight up with a velocity of 160 ft/ sec. The rock reaches a height of S= 160t - 16t2 ft after t sec. Find: i. How high does the rock go? ii. What are the velocity of the rock when it is 256 ft above the ground on the way up? iii. What is the acceleration of the rock at any time t? iv. When does the rock hit the ground again?
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