A boy of mass m = 40 kg running with speed v = 4 m/s jumps onto the outer edge of a merry-go-round of mass M = 160 kg and radius R = 1.8 m, as shown in the picture above. The merry-go-round is initially at rest, and can rotate about a frictionless pivot at its center. You may assume that the inital velocity of the boy is tangent to the edge of the merry-go round. Which of the following quantities are conserved throughout this problem for the system consisting of the boy and the merry-go-round? A) only kinetic energy B) kinetic energy and angular momentum C) only linear momentum D) linear momentum and angular momentum E) only angular momentum ------- I believe the answer is D, linear momentum AND angular momentum because both are conserved regardless of an inelastic or elastic collision right? :: Can somebody please check out my answer and help me if it is wrong? Thank you very much in advance.