Answer:
Throwing a penny off the Empire State Building wouldn't kill someone. A penny only weighs about a gram and it tumbles as it falls. Because of the tumbling and the lightweight, there's so much air resistance that the penny never really gathers that much speed before it hits its terminal velocity. A gram of weight traveling at a relatively slow speed might hurt a little if it hit you on the head, but it's not going to kill you.
Explanation:
