Question

You hang a 10 kg mass off of a vertical spring with a spring constant k...

You hang a 10 kg mass off of a vertical spring with a spring constant k = 15 N/m. How much does the spring stretch? Then, you take the spring and lay it flat on a friction-less table, anchoring one end. You attach the same mass to free end, pull it back 0.25 meters from its equilibrium position, and let go. How fast is the mass going at the equilibrium position?

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Answer #1

You hang a 10 kg mass off of a vertical spring with a spring constant k = 15 N/m. How much does the spring stretch?

Use formula

Here the force is the weight of the hanging mass

ANSWER:

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You attach the same mass to free end, pull it back 0.25 meters from its equilibrium position, and let go. How fast is the mass going at the equilibrium position?

When the spring is released, the elastic potential energy of the spring is converted into kinetic energy of the mass

ANSWER:

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