AP EAMCET 22 May 2023 Shift 1 Paper

A block A of mass 1.6‌kg kept on a horizontal surface is connected to one end of a horizontal spring whose other end is fixed to a rigid vertical wall. The spring and block A system is executing simple harmonic motion with an amplitude of 10‌cm. Another block B of mass 0.9‌kg is kept on the block A when block A is passing through its equilibrium position. The amplitude of oscillation of the system of spring, block A and block B is