B. A heavy rock is thrown straight up with a velocity of 160 ft/ sec. The rock reaches a 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 /? round again?

College Algebra
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Chapter3: Polynomial Functions
Section3.5: Mathematical Modeling And Variation
Problem 7ECP: The kinetic energy E of an object varies jointly with the object’s mass m and the square of the...
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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 S160t - 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 /?
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 S160t - 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 /? iv. When does the rock hit the ground again?
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