Question

A particle of dust is bombarded by air molecules and follows a zigzag path at constant speed v. Assuming each step has a length d.... What is the length of the displacement vector after N steps where N is large? Assume that each step is taken in a random direction on the plane. A particle of dust is bombarded by air molecules and follows a zigzag path at constant speed v. Assuming each step has a length d.... What is the length of the displacement vector after N steps where N is large? Assume that each step is taken in a random direction on the plane. @Physics

Answer 1

How do I get the answer, \[d\sqrt{N}\]

Answer 2

Please help!!