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QJEEM21Ph18ed: JEE Main 2021 Physics - Class 11 JEEM21Ph18ed Solution: A uniform chain of length 3 meter and mass 3 kg overhangs a…

A uniform chain of length 3 meter and mass 3 kg overhangs a smooth table with 2 meter lying on the table. If k is the kinetic energy of the chain in joule as it completely slips off the table, then the value of k is ................. . (Take g = 10 m/s2)

Step-by-Step Verified Solution

JEE Main 2021 (Online) 26th August Morning Shift Physics - Work Power & Energy Question 73 English Explanation
From energy conservation

Ki + Ui = kf + Uf

0+(−1×10×12)=kf+(−3×10×32)0 + \left( { - 1 \times 10 \times {1 \over 2}} \right) = {k_f} + \left( { - 3 \times 10 \times {3 \over 2}} \right)

−- 5 = kf −- 45

kf = 40 J

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