Problem $3$:

The equations of motion asked in this problem should be represented in the s domain. So$,$ you

can directly write the equations of motion in time domain by Newton's method and then take

the Laplace of them.

For each of the rotational mechanical systems

shown in Figure P$2\mathrm{.}16,$ write, but do not solve, the

equations of motion. $[$Section: $2\mathrm{.}6]$

$($a$)$

$($b$)$

FIGURE P$2\mathrm{.}16$