Two masses, $m_A=35\mathrm{.}0kg$ and $m_B=40\mathrm{.}0kg,$ are connected by a rope that hangs over a pulley

$($as in the figure $($Figure $1)).$ The pulley is a uniform cylinder of radius $0\mathrm{.}381m$ and mass $3\mathrm{.}1kg.$

Initially $m_A$ is on the ground and $m_B$ rests $2\mathrm{.}4m$ above the ground.

Part A

If the system is released, use conservation of energy to determine the speed of $m_B$ just before it strikes the ground. Assume the pulley bearing is frictionless.

Express your answer using two significant figures.