Work Energy And Power Question 246

Question: A uniform chain of length 2 m and mass 0.1 kg overhangs a smooth table with its two third part lying on the table. Find the kinetic energy of the chain as it completely slips- off the table.

Options:

A) 89J

B) 125J

C) 37J

D) 113J

Show Answer

Answer:

Correct Answer: A

Solution:

[a] U1=0/3mgxdx=118mg;

U2=0mgxdx=12mg;

lossinP.E.=U1U2=49mg

=49×0.1×10×2=89J=FinalK.E.



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