projectile motion

Question

A man is walking along the beach when a rock hits the top of his head. He looks up and realizes that it must have come from a 45 meter cliff above her. If the man is 1.97 meters tall, what was the angle of impact the rock had on top of her head? What was the rock's final velocity when it hit him? (Assume the rock would have an original velocity of 9.3m/s)

Answer 1

You can't solve this problem without knowing something about how far away the cliff is.