Two crates of mass and are connected by a massless rope that passes over a massless, fri...

Two crates of mass and are connected by a massless rope that passes over a massless, frictionless pulley as shown in Figure P6.45. The crates start from rest. (a) Add a coordinate system to Figure P6.45. (b) What are the initial kinetic and potential energies of each crate? (c) If the crate on the left moves downward through a distance h, what is the change in the potential energy of Express your answers in terms of h. (d) What is the speed of the crates after they have moved a distance h = 2.5 m?