If the collar $P$ is given a constant acceleration $a=4\mathrm{.}0g$ to the right, the pendulum will assume a steady$-$state deflection $=31.$

Determine the stiffness $k_T$ of the torsional spring which will allow this to happen. The torsional spring is undeformed when the

pendulum is in the vertical position. Set $m=3\mathrm{.}7kg$ and $L=625mm.$

Answer: $k_T=$

$N*\frac{m}{r}ad$