When a 0.20-kg mass is suspended from a vertically hanging spring, it stretches the spring from its original length of 2.0 cm to a total length of 7.0 cm. The spring with the same mass attached is then placed on a horizontal frictionless surface. The mass is pulled so that the spring stretches to a total length of 10.0 cm; then the mass is released and it oscillates back and forth (the figure below). What is the maximum speed of the mass as it oscillates?


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