Which of the following best describes the motion of a mass attached to a horizontal spring in simple harmonic motion?

Construct a Table indicating the position x of the mass in Fig. 14–2 at times $t=0,\frac{1}{4}T,\frac{1}{2}T,\frac{3}{4}T,T,\text{ and }\frac{5}{4}T,$ where T is the period of oscillation. On a graph of x vs. t, plot these six points. Now connect these points with a smooth curve. Based on these simple considerations, does your curve resemble that of a cosine or sine wave?

Determine the phase constant ϕ in Eq. 14–4 if, at t = 0, the oscillating mass is at 𝓍 = A .

Determine the phase constant ϕ in Eq. 14–4 if, at t = 0, the oscillating mass is at 𝓍 = ― A.

Determine the phase constant ϕ in Eq. 14–4 if, at t = 0, the oscillating mass is at 𝓍 = ― 1/2 A.