Experiment 4: crumple the paper to make a compact ball or wad. Now hold the paper and the book side by side and drop them both from the same height at the same time. Observe carefully and answer the following questions. Please select (highlight in a different color), the best answer from the choices provided. 7. In Experiment 4 we see that a) the paper starts to spin while falling, this slows it down and it hits the floor several seconds after the book does. b) the paper and the book fall at the same rate and hit the floor at the same time. c) the book accelerates to the floor at a much faster rate than the paper, and hits the floor several seconds earlier than the paper. d) the paper accelerates to the floor at a much faster rate than the book, and hits the floor several seconds earlier the book. 8. The observations in Experiment 4 can be best explained as follows: a) the circular shape of the wad of paper creates an axis of rotation through its center. As it falls, the air pushes up on the paper causing it to rotate about this axis. This drains energy from the paper causing it to fall at a slower rate. Therefore, the paper hits the floor several seconds after the book. ) crumpling up the sheet of paper into a wad reduces its surface area. Due to its smaller surface area, the wad of paper experiences a much smaller air resistance. Since it has the same acceleration due to gravity as the book, it falls at the same rate as the book and hits the floor at the same time. c) the book is several times heavier than the paper, therefore the acceleration due to gravity the book experiences is several times greater than what the paper experiences. The shape of the paper has no effect at all, and thus the book hits the floor several seconds earlier than the paper. d) the paper is several times lighter than the book, and it is also now smaller in size than the book, therefore the acceleration due to gravity the paper experiences is several times greater than that which the book experiences. Therefore, the paper hits the floor several seconds earlier than the book