a height of 1250 feet above street level, an item is launched from the Empire State Building. Its starting velocity is zero. The position function s = f(t) = 1250-16t2 may be used to represent the object's height. a) At t = 5 s, check if the item is still descending. b) Calculate the instantaneous velocity of the item at time t = 6 s. c) What is the

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At a height of 1250 feet above street level, an item is launched from the Empire State Building. Its starting velocity is zero. The position function s = f(t) = 1250-16t2 may be used to represent the object's height.

a) At t = 5 s, check if the item is still descending.
b) Calculate the instantaneous velocity of the item at time t = 6 s.
c) What is the acceleration of an object moving at constant velocity? Justify your answer.

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