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    Poisonberry's Avatar
    Poisonberry Posts: 1, Reputation: 1
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    #1

    Nov 28, 2007, 07:25 PM
    Physics Projectile Motion
    A plane drops a hamper of medical supplies from a height of 4660 m during a practice run over the ocean. The plane's horizontal velocity was 121 m/s at the instant the hamper was dropped. The acceleration of gravity is 9.8 m/s/s. What is the magnitude of the overall velocity of the hamper at the instant it strikes the surface of the ocean?
    red_cartoon's Avatar
    red_cartoon Posts: 52, Reputation: 6
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    #2

    Nov 30, 2007, 10:01 AM
    Time taken for the hamper to travel 4660m in free fall is :



    Using this value of t you can calculate the horizontal component of the velocity at the instant the hamper touches ocean :



    Assuming that drag/friction of air is zero, we already know

    So the overall velocity is :



    That's it, done :)
    Hope this helps.
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