Three individuals stand at the top of a cliff and get rid of rocks over the side

Physics Oct 14, 2020

Three individuals stand at the top of a cliff and get rid of rocks over the side. The first individual throws a rock up. The second throws a rock straight down. The third drops the rock. If all three individuals get rid of their rocks at exactly the same time, in what order do the rocks land? Explain using reasoning supported by theory (CRE).