Two identical blocks \( A \) and \( B \), each of mass \( m=3 \mathrm{~kg} \), are connected wit...

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Two identical blocks \( A \) and \( B \), each of mass \( m=3 \mathrm{~kg} \), are connected with the help of an ideal spring and placed on a smooth horizontal surface as shown in the given figure. Another identical block \( C \) moving with velocity \( v_{0}=0.6 \mathrm{~m} / \mathrm{s} \) collides with \( A \) and sticks to it, as a result, the motion of system takes place in some way.
Based on this information, answer the following questions:
Oscillation energy of the system, i.e., part of the energy which is oscillating (changing) between potential and kinetic forms, is
(1) \( 0.27 \mathrm{~J} \)
(2) \( 0.09 \mathrm{~J} \)
(3) \( 0.18 \mathrm{~J} \)
(4) \( 0.45 \mathrm{~J} \)
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