Two girls are sitting on the edge of a building tossing coins over the edge. Alice is actually dropping her coins, each of which is 10 g. Barbara is tossing her coins horizontally at 0.3 m/s, and her coins are 40 g each. (See figure.) (Ignore air resistance.)
When the coins are in midair, how does the acceleration of one of Alice's coins compare with the acceleration of one of Barbara's?