Work/Energy problem with Friction
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u just need that pen that writes on the screen to accomplish the perfectness of teaching physics online, (+a calculator in all vids :P) , other than that ur (y)
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Thanks
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energy IS conserved its just converted into heat, that iswhy you don't get the total KE equal to PE at the beginning. you should've stressed on that
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isn't Wf equal to F∆rcosø? because W=F•r which is a dot product...
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These video make my understanding better
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Dear Mr. Khan
Please stop doing Physics explanations. Indeed, energy is ALWAYS conserved. For this problem should talk only about Mechanical energy or kinetic energy. This idea of ''energy wasted by friction'' etc is not correct. The answer is correct but the explanation is wrong, You are a great explainer ,but if you provide misleading explanations, we professors in engineering have to spend a vast amount of time correcting these misconceptions with only limited success. Prof Arun Srinivasa
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friction?
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OHHHH, I get it now! Thanks so much - this is a big help, and you explain so much clearer than my physics teacher!
azngirlchibi 2 years ago 48
your videos are amazing our physics teacher isnt the greatest but she tries .. she admits your videos are better and uses them all the time to help us understand concepts thanks for sharing your knowledge
Whatsthedealwithit 2 years ago 31