Find the kinetic energy of the system after mass is released

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Reference no: EM13537332

A 0.4 kg mass attached to a spring is pulled back horizontally across a table so that the potential energy of the system is increased from zero to 150 J. Ignoring friction, what is the kinetic energy of the system after the mass is released and moved to a point where the potential energy has decreased to 85 J?

Reference no: EM13537332

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