Two figure skaters are coasting in the same direction, with the
leading skater moving at 6.1 m/s and the trailing skater
moving at 7.5 m/s. When the trailing skater catches
up with the leading skater, he picks her up without applying any
horizontal forces on his skates. If the trailing skater
is 32% heavier than the 50 kg leading skater,
what is their speed (in m/s) after he picks her up?
m/s