SOLUTION: If a man throws a wrench from a height of 128 feet with an initial velocity of 32 feet per second, what is the height of the wrench after 1 second? How long does it take for the wr

Question 329730: If a man throws a wrench from a height of 128 feet with an initial velocity of 32 feet per second, what is the height of the wrench after 1 second? How long does it take for the wrench to reach the ground? The height of the wrench above the groundafter t seconds is given by S(t)=-16t-32t+128
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If a man throws a wrench from a height of 128 feet with an initial velocity of 32 feet per second, what is the height of the wrench after 1 second? How long does it take for the wrench to reach the ground? The height of the wrench above the groundafter t seconds is given by S(t)=-16t-32t+128 *** It's -16t^2
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S(t)=-16t^2-32t+128
S(1) = -16*1 - 32*1 + 128
S(1) = 80 feet
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S(t)=-16t^2-32t+128 = 0
t^2 + 2t - 8 = 0
(t-4)*(t+2) = 0
t = 4 seconds

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