A block is held at rest against a compressed spring at point $$\(A\)$$ at the top of a frictionless track of height $$\(h\)$$, as shown above. The block is released, loses contact with the spring at point $$\(B\)$$, and slides along the track until it passes point $$\(C\)$$, also at height $$\(h\)$$. How do the potential energy $$\(U\)$$ of the block-Earth system and the kinetic energy $$\(K\)$$ of the block at point $$\(C\)$$ compare with those at point $$\(A\)$$ ?

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