Multiple choice general knowledge sports

A sheet of paper can be pulled out from under a book without toppling it if the paper is jerked quickly. This is because

  1. gravity pulls very hard on the book

  2. the book has inertia

  3. there is an action-reaction pair operating

  4. the book has very little weight
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the paper is jerked quickly, the force is applied for too short a time to overcome the book's inertia, so the book tends to stay where it is. Inertia is the tendency of a massive object to resist changes to its state of motion. Gravity (A) and action-reaction (C) are real but do not explain the quick-pull effect.

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