A 0.250 kg dart is fired into a stationary 1.20 kg block of wood that is on a frictionless surface (of course!). The dart and block then impact a spring with a spring constant of k = 1120 N/m and compresses it 0.360 m. (Use g = 10 m/s2, as needed. Do not enter units in numerical answers.) What is the total energy stored in the spring, in Joules, when it is fully compressed? ____  What is the speed, in m/s, of the dart-block combination after the collision? ____  How fast was the dart moving, in m/s, before it hit the block of wood?

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