When there is a reduction in amplitude over every cycle of vibration, then the body is said to have
free vibration
forced vibration
damped vibration
none of the mentioned
Answer
When there is a constant amplitude over every cycle of vibration, then the body is said to have
undamped vibration
In under damped vibrating system, if x1 and x2 are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to
$$\frac{x_1}{x_2}$$
$$\ln\left(\frac{x_1}{x_2}\right)$$
$$\log_e\left(\frac{x_1}{x_2}\right)$$
$$\log\left(\frac{x_1}{x_2}\right)$$
The ratio of the maximum displacement of the forced vibration to the deflection due to the static force, is known as
damping factor
damping coefficient
logarithmic decrement
magnification factor
Two springs have spring stiffness of 1500 N/m and 2000 N/m respectively. If they are connected in series, what is the spring stiffness of an equivalent system.
3500 N/m
1166 N/m
857.63 N/m
None of the above