In which vibration system, amplitude of vibration reduces toward zero with respect to time?

In which vibration system, amplitude of vibration reduces toward zero with respect to time?

Options:

a. free vibrations
b. forced vibrations
c. damped vibrations
d. none of the above

Correct Answer: c. damped vibrations

Explanation:

Vibration can be defined as the oscillatory motion of an object around an equilibrium position, due to the force acting on it. When the force acting on the object becomes zero, it will attain the equilibrium position.

The vibration in which there is no any external force is applied and energy is neither added nor removed, is called as free vibrations. In free vibrations, the object keeps vibrating and never gets the equilibrium position. The vibration in which energy is added in the system with respect to time is called as forced vibration. In forced vibration, as energy is added in the system, the object never returns to its equilibrium position. The vibration in which energy loss takes place due to some external resistance to vibration is called as damped vibrations. Due to this energy loss the object returns to its equilibrium position after some time and amplitude becomes zero.