A person standing at the edge of a cliff throws one ball straight up and another ball straight down, each at the same initial speed. Neglecting air resistance, which ball hits the ground below the cliff with the greater speed?
Since both balls have the same conditions at the cliffs edge (in downward motion), they will have the same speed just before they reach the ground. Ball B will reach the ground quicker since Ball A had to travel up and then back down again to reach the edge of the cliff.
