Two children who are bored while waiting for their flight at the airport decide to race from one end of the 20-m-long moving sidewalk to the other and back. phillippe runs on the sidewalk at 2.0 m/s (relative to the sidewalk). renee runs on the floor at 2.0 m/s. the sidewalk moves at 1.5 m/s relative to the floor. both make the turn instantly with no loss of speed. a. who wins the race