Spring Potential Energy and Kinetic Energy

Question

Two blocks of identical mass $$m$$ are connected by a massless spring of spring constant $$k$$ and natural length $$L_0$$. The system is on a frictionless horizontal surface. The blocks are released from rest when the spring is stretched to a length of $$2L_0$$. What is the speed of each block when the spring returns to its natural length?

Accepted Answer

$$v = L_0\sqrt{\frac{k}{2m}}$$

Answer

$$v = 2L_0\sqrt{\frac{k}{m}}$$

Answer

$$v = L_0\sqrt{\frac{k}{m}}$$

Answer

$$v = L_0\sqrt{\frac{2k}{m}}$$

Spring Potential Energy and Kinetic Energy

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