A spring-block system is placed on a rough ho | vedclass

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(C) $1$. The system consists of a block of mass $m$ attached to a spring of constant $K$ on a rough surface with coefficient of friction $\mu$. $2$. S

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Work-energy principle

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(C) $1$. The system consists of a block of mass $m$ attached to a spring of constant $K$ on a rough surface with coefficient of friction $\mu$. $2$. Since the surface is rough,there is a non-conservative force (friction) acting on the system. Therefore,mechanical energy is not conserved. $3$. The net external force on the system is not zero (due to the wall and friction),so linear momentum is not conserved. $4$. The work-energy principle states that the work done by all forces (conservative and non-conservative) is equal to the change in kinetic energy of the system. This principle is universally applicable to any system,regardless of whether forces are conservative or non-conservative. $5$. Thus,the work-energy principle can be applied to this system.

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