In Curling, large "Stones" are slid on long sheets of ice and collide into other, identical Stones. Assume for this problem that the friction due to the ice can be neglected. Consider a collision where initially one stone is at rest and the other is moving with a velocity vi. After the collision, the stones are traveling at 450 angles to the direction of the initial velocity and the final speed of the incoming stone is v1 . The mass of curling stones is M = 19.1 kg. The final speed of the first stone is v1 = 0.450 m/s. What is the initial speed, vi? Give your answer in m/s to at least three significant digits. Vi 450 450