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Problem $11\mathrm{.}055-$ Relative motion of system of particles with two degrees of freedom

Collar A starts from rest at $t=0$ and moves upward with a constant acceleration of $3\mathrm{.}6in\frac{.}{s^2}.$ Collar $B$ moves

downward with a constant velocity of $16$ in$./$s$.$

Problem $11\mathrm{.}055.$a $-$ Relative motion of system of particles with two degrees of freedom

Determine the time at which the velocity of block $C$ is zero. $($Round the final answer to three decimal places.$)$

The time at which the velocity of block $C$ is zero is