1981B2. A massless spring is between a 1 kilogram mass and a 3 kilogram mass as shown above, but is not attached to either mass. Both masses are on a horizontal frictionless table. In an experiment, the 1 kilogram mass is held in place and the spring is compressed by pushing on the 3 kilogram mass. The 3 kilogram mass is then released and moves off with a speed of 10 meters per second.(adsbygoogle = window.adsbygoogle || []).push({});

a. Determine the minimum work needed to compress the spring in this experiment.

The spring is compressed again exactly as above, but this time both masses are released simultaneously.

b. Determine the final velocity of each mass relative to the table after the masses are released.

attempt:

1/2mv^2=1/2kx^2

1/2mv^2=150, but idk how to solve for k or x

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

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# I'm Incompetent

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