Recent content by Arthur Smyth

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    Is this work-energy theorem for a system correct?

    Hi Karuman... That makes sense... I think I know what's going on now... except I still don't understand that in my example W=0, yet Einternal is subsitituted with Fkdcosθ... doesn't Fkdcosθ imply work? Thank you for your patience...
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    Is this work-energy theorem for a system correct?

    TSny... thank you!... I'm not going mad, after all. I do have one question though... I understand that the two friction forces contained in the system of tabletop and sliding block cancel out (at least I hope they do) and thus W = 0... but if Einternal = Fkd cosθ, then isn't Fk doing work. I'm...
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    Is this work-energy theorem for a system correct?

    Homework Statement [/B] A 4 kg mass slides 2 m over a horizontal surface with force of kinetic friction of 2N, initial velocity is 5 m/s. Find it's final velocity. My problem... we've been asked to solve this problem using the Work-Energy theorem, and we've been given it in the form of: W =...