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Magazine Chapter 6: Q.3 (page 153)
Kat, Matt, and Nat are arguing about why a physics book on a table doesn鈥檛 fall. According to Kat, 鈥淕ravity pulls down on it, but the table is in the way so it can鈥檛 fall.鈥� 鈥淣onsense,鈥� says Matt. 鈥淎n upward force simply overcomes the downward force to prevent it from falling.鈥� 鈥淏ut what about Newton鈥檚 first law?鈥� counters Nat. 鈥淚t鈥檚 not moving, so there can鈥檛 be any forces acting on it.鈥� None of the statements is exactly correct. Who comes closest, and how would you change his or her statement to make it correct?
Short Answer
The book does not change its state of motion, according to Newton's first law. As a result, the book remains motionless."
Step by step solution
Introduction
"Gravity pulls it down, but the table prevents it from falling."
Explanation
Draw a schematic design of the book and list all of the forces at work in the physics book that is sitting still on the table.
The normal response force is an equal and opposing force to weight, according to Newton's third law.
Draw the following free body diagram for the physics book:
The response force is N, while the gravitational force is mg.
Explanation
The weight is the sole external force acting on the book, as seen in the diagram above.
The Because the force on the book is zero, Newton's first law states that the book does not change its state of motion. As a result, the book remains motionless.
Step 4: explanation
As a result, Kat's assertion is the most accurate.
"This is the right statement: " "The book is pulled down by gravity, but the table creates an equal and opposite force termed the normal reaction, resulting in a net force of zero on the book. As a result, the book does not change its state of motion, according to Newton's first law. As a result, the book remains motionless."
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