(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Moving blocks connected by a spring

Two identical 0.13 kg blocks (labeled 1 and 2) are initially at rest on a nearly frictionless surface, connected by an unstretched spring whose stiffness is 225 N/m, as shown in the upper diagram. Then a constant force of 8 N to the right is applied to block 2, and at a later time the blocks are in the new positions shown in the lower diagram. At this final time, the system is moving to the right and also vibrating, and the spring is stretched.

2. Relevant equations

KE= (1/2)mv^2

U= (1/2)kx^2

3. The attempt at a solution

What is the final translational kinetic energy of the real system?

What is the final vibrational kinetic energy of the real system?

I'm a little lost on how to find the two different kinetic energies since the problem doesnt give a final velocity. I found that the final total kinetic energy is .595 joules and that the total final potential energy is .045 joules, but i don't know to separate the two kinetic energies.

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# Homework Help: Moving Blocks Connected by a spring

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