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Appleton
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From my very limited knowledge of calculus I would have thought that if mass is assumed constant d/dt (1/2mv^2) = 1/2m2v. This seems to be corroborated by one website http://www.Newton.dep.anl.gov/askasci/phy05/phy05008.htm and seems to follow the general rule d/dt (x^n) = nx^(n-1)
However in the Feynman lectures (Volume 1 13-1 (13.2)) http://student.fizika.org/~jsisko/Knjige/Opca%20Fizika/Feynman%20Lectures%20on%20Physics/Vol%201%20Ch%2013%20-%20Work%20and%20Potential%20Energy%201.pdf he states that if mass is assumed constant d/dt (1/2mv^2) = 1/2m2v(dv/dt).
Could someone help explain what I have most likely misunderstood?
However in the Feynman lectures (Volume 1 13-1 (13.2)) http://student.fizika.org/~jsisko/Knjige/Opca%20Fizika/Feynman%20Lectures%20on%20Physics/Vol%201%20Ch%2013%20-%20Work%20and%20Potential%20Energy%201.pdf he states that if mass is assumed constant d/dt (1/2mv^2) = 1/2m2v(dv/dt).
Could someone help explain what I have most likely misunderstood?
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