A mechanical trigger mechanism utilizes a high-tensile spring with a spring constant of 250 N m-1 to launch a small projectile. The spring is compressed from its natural length as shown in the diagram, storing 0.80 J of elastic potential energy.
What is the compression, xxx, of the spring?
0.0064 m0.0064\text{ m}0.0064 m
0.040 m0.040\text{ m}0.040 m
0.057 m0.057\text{ m}0.057 m
0.080 m0.080\text{ m}0.080 m