1.

When the kinetic energy of the body executing SHM is 1/3 of the potential energy, the displacement of the body is x% of the amplitude, where x is :

Answer»

33
67
87
50

Solution :When `y=(x)/(100).r` then `K.E.=(1)/(3)` P.E.
`IMPLIES(1)/(2)m omega^(2)(r^(2)-y^(2))=(1)/(3).(1)/(2)m omega^(2)y^(2)`
`implies""y=(sqrt(3))/(2).r`
`(x)/(100)r=(sqrt(3))/(2)rimpliesx=50 sqrt(3)=87` (appx.)
Correct choice is ( C ).


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