Two children are standing on a 150-kg wagon that is at rest. The children jump off in opposite directions. The 40.-kg boy jumps off at +4.0 m/s and the 50.-kg girl jumps off at -2.0 m/s. What is the speed and direction of the wagon?

If 2 different solids have the same masses but different volumes, how will their densities compare? a. the solids will have the same densities. b. the solid with lower volume will have a higher density. c. the solid with greater volume will have a higher density. d. the solid with greater volume will have double the density of the solid with the lower volume.