In this problem, a 1.90 g ice flake is released from the edge of a hemispherical bowl whose radius r is 15.0 cm. The flake-bowl contact is frictionless. a) What is the speed of the flake when it reaches the bottom of the bowl? (b) If we substituted a second flake with twice the mass, what would its speed be? *Our teacher gave us these problems and they are from a totally different book than we are using, and we havent been able to find any examples like this in our book. We don't even know where to begin..* Please help!