Leyla drops a penny from a height of 150 m. How long will it take the penny to hit the ground? Use the formula h(t)=−4.9t2+vot

Question

Leyla drops a penny from a height of 150 m.
How long will it take the penny to hit the ground?
Use the formula h(t)=−4.9t2+vot+h , where vo is the initial velocity and h is the initial height.
Round to the nearest tenth of a second.

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0

Answers ( No )

    0
    2021-11-15T15:34:44+00:00

    Wrong question…

    Answer:

    The answer is 3.8

    Step-by-step explanation:

    0
    2021-11-15T15:35:09+00:00

    When the penny hits the ground, h will = 0.

    So:  Set h(t) = 0 = -4.9t^2 + 0t + 150 m

    Then 4.9t^2 = 150, and so t^2 = sqrt(150 / 4.9)   =    plus or minus 5.53 sec.

    We can use only the positive root, as we’re measuring time.

    t = 5.5 sec (answer)

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