Question

every spring has an equilibrium position. which statements describe a spring at its equilibrium position? check all that apply. the spring constant is zero. the elastic potential energy is at a maximum. the elastic potential energy is zero. the displacement of the spring is at a maximum. the net force acting on the spring is zero.

Explanation:

At equilibrium, no external force deforms the spring, so elastic - potential energy ($U=\frac{1}{2}kx^{2}$, where $x = 0$ at equilibrium) is zero. Also, since there is no acceleration at equilibrium, according to Newton's second law $F_{net}=ma$ ($a = 0$), the net force $F_{net}=0$. The spring - constant is a property of the spring and not zero at equilibrium. Elastic potential energy is maximum when the spring is most deformed. Displacement is maximum when the spring is stretched or compressed most, not at equilibrium.

Answer:

The elastic potential energy is zero.
The net force acting on the spring is zero.