Q3) Mark a circle on false or true for the correct answer. A- Referring to a single degree of freedom damped system with free vibration, vibration only occurs when >1. B- Considering the dimensionless factor () versus Wn folk - Curve for damped forced system, the dimensionless factor decreases as the damping ratio increases. ωπ 1). C- Referring to a single degree of freedom damped forced system, the resonance occurs at (- D- Referring to equation of motion for forced damped system, the damping coefficient "C" can be found from the ratio of x coefficient to * coefficient by knowing the system mass, damping ratio and its natural frequency. E- Referring to spring-mass system with forced false true false true false true false true false true damped vibration, the exciting force affecting the value of the natural frequency of the system. F-The simple spring-mass system vibrates freely without damping by any periodic motion. G- Referring to simple energy method, the sum of the K.E. and the P.E. for non- conservative system is equal constant at any interval of time. false true false true (25 mark)