If a small block of mass m is placed gently on M when it is passing through its mean position. Find it's new amplitude of SHM, if initial amplitude is A.
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a}\(\sqrt { M\over M+m}\)(A)
b}\(\sqrt{ M+m\over M}\)(A)
C}\(\sqrt{ M+m\over 2 M}\) (A)
d}\(\sqrt{ M\over M-m}(A)\)