A block with mass m =6.8 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.22 m. While at this equilibrium position, the mass is then given an initial push downward at v = 5 m/s. The block oscillates on the spring without friction.

• 1) What is the spring constant of the spring?
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• 2 )What is the oscillation frequency?
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• 3) After t = 0.3 s what is the speed of the block?
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• 4) What is the magnitude of the maximum acceleration of the block?
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• 5) At t = 0.3 s what is the magnitude of the net force on the block?
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• 6) Where is the potential energy of the system the greatest?