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

    Aug 16, 2012, 11:38 PM
    A cube of side l rests on a surface . By what height will the centre of mass of cube
    A cube of side l rests on a surface . By what height will the centre of mass of cube rise if a bullet is fired with velocity v at a length 2/3l from the surface.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Aug 17, 2012, 05:57 AM
    I don't believe this problem can be solved with the linited anount of information provided. We need to know:

    - mass of the cube
    - the type of collision between bullet and cube - is it elastic? Ineleastic? Or does the bullet penetrate the cube some distance?
    - the type of friction between cube and the floor - is it frictionless? Or does it have a static coefficient of friction that keeps it from sliding?
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