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    akalberts's Avatar
    akalberts Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Mar 5, 2009, 04:28 PM
    snowball fired from a cliff
    A 1.50 kg snowball is fired from a cliff 13.5 m high. The snowball's initial velocity of 14.0 m/s, directed 41.0° above the horizontal.
    (a) How much work is done on the snowball by its weight during its flight to the ground below the cliff?
    1 J
    (b) What is the change in the gravitational potential energy of the snowball-Earth system during the flight?
    2 J
    (c) If that gravitational potential energy is taken to be zero at the height of the cliff, what is its value when the snowball reaches the ground?
    3 J
    Varoth's Avatar
    Varoth Posts: 58, Reputation: 2
    Junior Member
    		  
    #2

    Mar 5, 2009, 04:29 PM

    Please tell me this isn't a homework question.
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