Which statements correctly describe the energy method for identifying small SHM about a stable equilibrium?

Select all that apply

• Option A

  If U(x) = U₀+½kx² near equilibrium, then ω = √(k/m).

• Option B

  If U(x) = U₀+αx²+βx⁴, then sufficiently small oscillations about x = 0 have ω = √(2α/m).

• Option C

  Only the quadratic term in the potential determines the leading small-oscillation frequency.

• Option D

  The energy method can determine the period without first writing the force explicitly.