A spring with a spring constant of 2600 newtons per meter is compressed 0.10 meter
from its unstretched position. The spring is released, propelling a 3.0-kilogram block along a horizontal, frictionless surface. This block then collides with a stationary 1.0-kilogram block. The blocks remain joined and move together. Determine the total amount of elastic potential energy stored in the spring when the spring is compressed
0.10 meter.