일반물리학 1 — Oscillations: Problem 32

32. What is the phase constant for the harmonic oscillator with the velocity function \( v(t) \) given in Fig. 15-32 if the position function \( x(t) \) has the form \( x = x_m \cos(\omega t + \phi) \)? The vertical axis scale is set by \( v_s = 8.0 \text{ cm/s} \).