A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope in

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A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 20.0° above the horizontal. The sledge moves a distance of 20.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500. (a) What is the tension in the rope? (b) How much work is done by the rope on the sledge? (c) What is the mechanical energy lost due to friction?
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you are literally the only reason why I am passing physics, thank you

josephsepulveda
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I really appreciate the smooth jazz coming into every video. I mean im stressed. I hate physics. Then next thing I know I get a wave of comfort from some nasty tunes. Thanks man

paumanification
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you save my life daily thank you so much

sandrahuynh
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Coming to this after 7 years. Currently taking physics so this is extremely helpful

blobbob_official
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I am still confused. How was part c found? I am not understanding why it is the same as work done by friction.

devthaker
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My number was too small and everything was wrong😭😭😭

SincerelyTaylorGrace
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how would you solve for the increase in internal energy in the sledge and the surface due to friction? thx

Dayboi
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one question I had was that for part d, instead of using the Tcosx for the friction force, if we are using (myue(k))*n,
in the equation W=F*cosx*s, could angle be just cos180 without cos20 because friction force is not "tilted' like the rope? I was just kinda confused :-) THANK YOU VERY MUCH!

danielkwon