Answer
The kinetic energy is $~~352~J$
Work Step by Step
We can use work and energy to find the kinetic energy at the bottom:
$K_f+U_f = K_0+U_0+W$
$K_f+0 = 0+U_0+W$
$K_f = mgh+W$
$K_f = (60.0~kg)(9.80~m/s^2)(4.00~m) - (500~N)(4.00~m)$
$K_f = 352~J$
The kinetic energy is $~~352~J$
