The sport of curling is quite popular in Canada. A curler slides a 19.1-kg stone so that it strikes a competitor's identical stationary stone at 6.40 m/s before moving at an angle of 60.0 counterclockwise from its initial direction. The competitor's stone moves off at 5.60 m/s. Determine the final speed of the first stone v1,f. Ulf = m/s Determine the final direction of the second stone as an angle a relative to the first stone's initial direction of motion. Let a = counterclockwise from the first stone's initial direction define the direction of positive angles