(Solved): The figure shows a cord attached to a cart that can slide along a frictionless horizontal rail alig ...

The figure shows a cord attached to a cart that can slide along a frictionless horizontal rail aligned along an $x$ axis. The left end of the cord is pulled over a pulley, of negligible mass and friction and at cord height $h=1.5\mathrm{m}$, so the cart slides from $x_1=5.0\mathrm{m}$ to $x_2=1.0\mathrm{m}$. During the move, the tension in the cord is a constant $29.0\mathrm{N}$. What is the change in the kinetic energy of the cart during the move? Number Units