Question

Problem 21.12 The spring constant is $k = 800 ext{ N/m}$, and the spring is unstretched when $x = 0$. The mass of each object is 30 kg. The inclined surface is smooth. Neglect the mass of the pulley. The system is released from rest with $x = 0$. (a) Determine the frequency and period of the resulting vibration. (b) What is the value of $x$ at $t = 4 ext{ s}$?

          Problem 21.12 The spring constant is $k = 800 	ext{ N/m}$,
and the spring is unstretched when $x = 0$. The mass of
each object is 30 kg. The inclined surface is smooth.
Neglect the mass of the pulley. The system is released
from rest with $x = 0$.
(a) Determine the frequency and period of the resulting
vibration.
(b) What is the value of $x$ at $t = 4 	ext{ s}$?