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Introductory Physics Homework Help
Mechanical Energy Problem/non-conservative forces
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[QUOTE="fuvest, post: 5680999, member: 614855"] [h2]Homework Statement [/h2] A body of mass "m" is let go from on top of a surface A, where it slides down to B(without friction). From that point on, it displaces itself on an horizontal surface 5 meters away from B, where it stops at C. Being "m" a mass in kg "h" in meters and g = 10 m/s^2 The value, in Newtons, of the constant friction force F when the body dislocates itself is: [h2]Homework Equations[/h2] Ei = Ef W = F.d [h2]The Attempt at a Solution[/h2] My attempt was to set the change in kinetic energy equal to the total work. So therefore: 1/2mv^2 - mgh(converted from gravitational potential energy) = Tf at the very end, velocity will be zero because it stops so: -mgh = Tf replacing the work done by friction: -mgh = -F.5 .'. F = (10mh)/5 = 2mh Is this approach correct? Would you guys suggest another one? Is another possible? Thanks [/QUOTE]
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Introductory Physics Homework Help
Mechanical Energy Problem/non-conservative forces
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