A 4,500-kg roller coaster cart has a speed of 5.00 m/sm/s when it reaches its first peak at a 95.5 mm height from the ground level. After descending, it climbs up the second hill which is 81.2 mm above the ground level. How fast is the roller coaster cart at the top of the second hill? Assume there is no friction with the rails and no air resistance during the cart's motion.