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The formula h=-16t squared+s represents the time (t) that it takes an object to fall...

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bookworm309 | Student, Grade 9 | (Level 1) eNoter

Posted October 27, 2012 at 10:39 PM via web

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The formula h=-16t squared+s represents the time (t) that it takes an object to fall from a certain height (s) to an ending height (h). Cont. below

 

The question is "How high was a cliff if a coin dropped from the cliff took 2 seconds to hit the ground?

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najm1947 | Elementary School Teacher | (Level 1) Valedictorian

Posted October 28, 2012 at 2:34 AM (Answer #1)

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s = initial height

h = ending height, in this case ground therefore h = 0

t = 2 sec

h = -16t^2 + s

substituting values, we get:

0 = -16*2^2 + s

0 = -64 + s

s = 64 units

The height of cliff = 64

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