A mass-spring damper system with force as input and displacement of the mass as output has a transfer function$G\left( s \right) = \frac{1}{{\left( {{s^2} + 24\;s + 900} \right)}}$A force input F(t) = 10 sin (70 t) newtons is applied at time t = 0 s. A beam from an optical stroboscope is focused on the mass. In steady state, the strobe frequency in hertz at which the mass appears to be stationary is

A mass-spring damper system with force as input and displacement of th

1.	A mass-spring damper system with force as input and displacement of the mass as output has a transfer function$G\left( s \right) = \frac{1}{{\left( {{s^2} + 24\;s + 900} \right)}}$A force input F(t) = 10 sin (70 t) newtons is applied at time t = 0 s. A beam from an optical stroboscope is focused on the mass. In steady state, the strobe frequency in hertz at which the mass appears to be stationary is
A.	$\frac{5}{\pi }$
B.	$\frac{{15}}{\pi }$
C.	$\frac{{35}}{\pi }$
D.	$\frac{{50}}{\pi }$
Answer» D. $\frac{{50}}{\pi }$

1.	A mass-spring damper system with force as input and displacement of the mass as output has a transfer function\(G\left( s \right) = \frac{1}{{\left( {{s^2} + 24\;s + 900} \right)}}\)A force input F(t) = 10 sin (70 t) newtons is applied at time t = 0 s. A beam from an optical stroboscope is focused on the mass. In steady state, the strobe frequency in hertz at which the mass appears to be stationary is
A.	\(\frac{5}{\pi }\)
B.	\(\frac{{15}}{\pi }\)
C.	\(\frac{{35}}{\pi }\)
D.	\(\frac{{50}}{\pi }\)
Answer» D. \(\frac{{50}}{\pi }\)