A ramp of height
h smoothly levels out to become horizontal at its rightmost end. The entire ramp is moving horizontally to the right with a constant speed
v. A uniform solid sphere of mass
m is placed at the top of the ramp and released from rest relative to the ramp. The sphere rolls without slipping down the ramp. What is the total kinetic energy gained by the sphere in the lab frame by the time it reaches the horizontal section of the ramp?