Ayoung girl stands at the edge of a cliff, holding one ball in each hand. at time to, she throws one ball straight up with speed vo and the other straight down, also with speed vo. for the following questions neglect air resistance. pay particular attention to whether the answer involves "absolute" quantities that have only magnitude (e. g., speed) or quantities that can have either sign (e. g., velocity). which ball has the greater average speed during the 1-s interval after release (assuming neither hits the ground during that time)?