A child's toy consists of two pieces of mass 0.2 kg and 0.3 kg. It slides over a frictionless floor and an internal spring of negligible mass causes the two pieces to separate at a random time as a surprise. The 0.2 kg piece is measured moving off at 4.0 m/s at an angle of 60" from the initial direction. The 0.3 kg piece moves off at 40" from the initial direction, as shown but its speed was not measured. What was the initial speed of the two pieces before the separation? 7 4 m/s view from above