Anonymous
Anonymous asked in Science & MathematicsPhysics · 1 month ago

A hot air balloon has just lifted off and is rising at the constant rate of 1.8 m/s. Suddenly, one of the passengers realizes she has left..?

...her camera on the ground. A friend picks it up and tosses it straight upward with an initial speed of 11.2 m/s. If the passenger is 2.5m above her friend when the camera is tossed, how high is she when the camera reaches her?

1 Answer

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  • NCS
    Lv 7
    1 month ago

    We can't find her height directly. But after some time t, the camera and passenger will have the same height:

    h = 2.5m + 1.8m/s*t - ½gt² = 11.2m/s*t - ½gt²

    dropping units for ease (t is in seconds)

    2.5 + 1.8t = 11.2t

    2.5 = 9.4t

    t = 0.266 s

    passenger height

    h = 2.5m + 1.8m/s*0.266s - ½*9.8m/s²*(0.266s)² = 2.6 m

    check:

    camera height

    h = 11.2m/s*0.266s - ½*9.8m/s²*(0.266s)² = 2.6 m

    • Chels1 month agoReport

      okay done

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