A spring-mass system is viscously damped with a viscous damping constant c. The energy dissipated per cycle when the system is undergoing a harmonic vibration $X \operatorname{Cos} \omega_{d} t$ is given by
(A) $\pi c \omega_{d} X^{2}$
(B) $\pi \omega_{d} X^{2}$
(C) $\pi c \omega_{d} X$
(D) $\pi c \omega_{d}^{2} X$
A spring-mass system is viscously damped with a viscous damping constant c. The energy dissipated per cycle when the system is undergoing a harmonic vibration $X \operatorname{Cos} \omega_{d} t$ is given by
(A) $\pi c \omega_{d} X^{2}$
(B) $\pi \omega_{d} X^{2}$
(C) $\pi c \omega_{d} X$
(D) $\pi c \omega_{d}^{2} X$