013 (part 1 of 2) 10.0 points Given two masses, mi = 14 kg and m2 = 21 kg, mi is moving with a velocity v1 collid- ing with me, which is suspended by a string of length 3 m. The two masses are stuck together as the result of the collision. The compound system swings to the right, passes point B as shown in the figure, and stops at the horizontal level. The acceleration of gravity is 9.8 m/s". - m3 mil V1 m2 B A m3 = mi + m2 Find the kinetic energy K of the compound system immediately after the collision. Answer in units of J. 014 (part 2 of 2) 10.0 points Find the initial speed vi of mass m1 . Answer in units of m/s