A pencil falls off of a desk. What moves the pencil toward the floor?
A B C D
mass friction gravity speed
Question: A pencil falls off of a desk. What moves the pencil toward the floor?
(A) mass
(B) friction
(C) gravity
(D) speed

Answer: (C) gravity
Answer: (A) mass
Question: A pencil falls off of a desk. What moves the pencil toward the floor?
(A) mass
(B) friction
(C) gravity
(D) speed
Answer: (C) gravity