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A helicopter is ascending vertically with a speed of 4.50 m/s. At a height of 195 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the helicopter's.]

  • physics - , Monday, August 27, 2012 at 8:44pm

    hf=0=hi+vi*t+1/2 g t^2

    solve this squadratic equation for t
    hi=195
    g=-9.8
    vi=4.50

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