1. The problem statement, all variables and given/known data Three smooth stones, A, B and C are initially at rest, in contact with each other on the smooth surface of a frozen lake. The masses of the stones are A = 400 g, B = 300 g and C = 120 g and the coefficient of sliding friction between the stones and the ice is μslide = 0.0150. An explosion between the stones causes them to fly apart across the surface of the ice. Stone A flies off due North with an initial speed of 4.50 m s−1. Stone B flies off due east with an initial speed of 6.60 m s−1. If 20% of the total energy of the explosion was converted to the kinetic energy of the stones, what was the total energy released in the explosion? 2. Relevant equations KE= 1/2 * M * V^2 PE= mgh 3. The attempt at a solution total energy= ke+ pe work done= force*distance force= uR μslide = 0.0150 i dont know R. And i dont know the distance travelend to calculate work done. Need help please.