Compare a mass-spring system with friction only to the same system with viscous

Question

Compare a mass-spring system with friction only to the same system with viscous damping only; the frequency of the system with friction is Lower The same Dependent on values Keeping the suspension the same, increasing the weight of a car makes the system frequency Increase Decrease Stay the same Keeping the suspension the same, increasing the weight of a car makes the critical damping Increase Decrease Stay the same Keeping the suspension the same, increasing the weight of a car makes the vibration amplitude due to the road at high speed Increase Decrease Stay the same The frequency enhanced by a resonator tube depends on air temperature True False A resonator tube open at one end that amplifies a frequency f can also amplify its harmonic at 2f 3f 4f No harmonics The free response of a system with 3 degrees degrees of freedom has exactly 3 frequency components with non-zero amplitudes Always Sometimes Never In the matlab call [t y] = ode45 (@fun, [0 1], [2; 3];explain what each of the values 0, 1, 2 and 3 do.

Explanation / Answer

Solution D

Compare Mass spring system with friction only, Same system with viscous damping only

The frequency of system with friction is Dependent on values.

The motion of a body is resisted by frictional forces. in Vibrating system it is called damping. If it is provided by liquid is called viscous damping. Frequency will depends on damping co-efficient of values

Solution E

Keeping the suspension the same, increasing the weight of a car makes the system frequency Decrease

Frequency =(1/(2*3.14))*(s/m)^0.5.This equation shows that

Frequency indirectly proportional to the weight of the system. If weight increase frequency will decrease

Solution F

Keeping the suspension the same, increasing the weight of a car makes the system the critical damping will INCREASE.

Critical damping =2*m*(s/m)^0.5. This equation shows Critical damping directly proportional to the weight of the system.

Solution G

Keeping the suspension the same, increasing the weight of a car makes the system the vibration amplitude due to the road at high speed will DECREASE.

Weight will increase the damping co-efficient values due to that vibration amplitude will decrease

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