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

    Nov 19, 2012, 04:30 AM
    Physics problem solver
    Ana is redecorating her apartment. She slowly pushes on 80kg china cabinet across the wooden dining room floor which resist the motion with a 300N force of friction. What is the coefficient of sliding friction between the china cabinet and the floor?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Nov 19, 2012, 08:13 AM
    Friction force is the coefficient of friction times the normal force. For an object sitting on a level floor the normal force is its weight:



    You have everything you need to solve for
    Terciel's Avatar
    Terciel Posts: 7, Reputation: 1
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    #3

    Nov 20, 2012, 02:07 PM
    Ff=mass*gravity*coefficient of kinetic friction. So 300=80*9.81*coefficient. Shoulud be.3823
    CrisO96's Avatar
    CrisO96 Posts: 2, Reputation: 1
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    #4

    Dec 3, 2012, 09:22 PM
    If 6 Joules of work are done on a 6kg box that is moved 3 meters, how much force is applied to the box?
    W= Fd:
    D=?
    F=?
    W?
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #5

    Dec 4, 2012, 07:15 AM
    You are told that 6 joules of work are done so W=6 joules. It is moved 3 meters, so d = 3 meters. Now you can calculate the force, F, using W=Fd.
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