"On a frictionless, horizontal surface there is a spring with one end fixed and the other attached to a board of mass 1 kg. The spring coefficient is 150 N/m. 500g of clay moving at 3.0 m/s on this horizontal surface collides squarely with the board. As a result, the board and clay stick together, and the spring is compressed. Determine by how much the spring has shortened."(adsbygoogle = window.adsbygoogle || []).push({});

Since the clay sticks to the board, the coefficient of restitution is probably 0. The kinetic energy of the clay prior to collision is 1/2(500g)9=2.25 J while its potential energy is (I think) 0. The potential and kinetic energy of the spring prior to collision are both 0.

I'd appreciate a hint on how to start.

Many thanks

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# Homework Help: Stuck on conservation of energy problem

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