Two skaters, both of mass 75 kg, are on skates on a frictionless ice pond. One skater throws a
0.3-kg ball at 5 m/s to his friend, who catches it and throws it back at 5 m/s. When the first skater has caught the returned ball, what is the velocity of each of the two skaters?
2 . Popeye, of mass 70 kg, has just downed a can of spinach. He accelerates quickly and stops Bluto, of mass 700 kg (Bluto is very dense), who is charging in at 10 m/s. What was Popeye’s speed?

plzz help me .. i wanna study .. iam trying ...bt i cant do it .. plzz help me anyone