Question: A horizontal spring with spring constant 2 0 0 N / m is compressed by 1 5 cm and used to launch a 2 kg

A horizontal spring with spring constant 200N/m is compressed by 15cm and used
to launch a 2kg box across a frictionless horizontal surface. After the box travels
some distance, the surface becomes rough. The coefficient of kinetic friction of the
box on the surface is 0.2.
Use work and energy to find how far the box slides across the rough surface before
stopping.

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