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A mass-spring system with spring constant 20 N/m and mass 2.0 kg is displaced from its...

A mass-spring system with spring constant 20 N/m and mass 2.0 kg is displaced from its natural length by 20 cm. The mass is then released from this position.

1. What's the total energy as mass crosses through equilibrium position?

2. Find maximum speed.

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Answer #1

Concept - total energy can be found using the amplitude and spring constant as shown below. The total energy is equal to the kinetic energy at maximum speed.

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