Two cats are fighting on top of a slippery roof. Because they're distracted, they suddenly both start sliding down. They start with zero speed at the top, and each of them has a constant acceleration. By the time the first cat falls off the roof, the other cat has only slid down halfway (because it has sharper claws). Let's say the speed of the slower cat at that moment is 1.4 m/s, what is the speed of the faster cat at the same time? State the exact value in m/s.