one end of a uniform rod of mass m1 and cross sectio al area A is hung from a ceiling . the other end of the bar is supporting mass m2 . the stress at the midpoint is
a g (m2+ 2m1)/ 2A
b g ( m2 + m1) / 2A
c g (m2+ m1) /2A
d g ( 2m2+ m1 ) / 2A
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3mg/2a is right ......b.
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