Question

A horizontal spring with spring constant 150 N/m is compressed 17 cm and used to launch a 2.9 kg 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 0.15.

Use work and energy to find how far the box slides across the rough surface before stopping.

Express your answer to two significant figures and include the appropriate units.

Answer #1

A 100 ? / ? constant spring horizontal spring compresses 20 ??
and is used to launch a 2.5 ?? box across a horizontal surface
without friction. After the box travels a certain distance, the
surface becomes rough. The coefficient of kinetic friction of the
box on the surface is 0.15. Determine how far the box slides on the
rough surface before stopping.

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What is the speed of the box just before...

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Box 1 of mass 2 kg is pressed against a spring with spring
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