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a model rocket is projected straight upward from the ground level. It is fired with an initial velocity of 192 ft/s. How high is the rocket after 10 seconds? When is the rocket at a height of 432 feet? What is the maximum height of the rocket? When will the rocket hit the ground?

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Rick

  1. b. h = Vo*t + 0.5g*t^2
    Vo = 192 Ft/s
    g = -32Ft/s^2
    h = 432 Ft.
    Solve for t(Use Quadratic formula).

    c. h max = -(Vo^2)/2g = -(192^2)/-64 =
    576 Ft.

    d. V = Vo + g*Tr = 0
    Tr = -Vo/g = -192/-32 = 6 s. = Rise time

    Tf = Tr = 6 s. = Fall time.

    Tr+Tf = 6 + 6 = 12 s. to hit gnd.

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    Henry

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