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Imagine that you are holding a book weighing 4 $\mathrm{N}$ at rest on the palm of your hand. Complete the following sentences: (a) A downward force of magnitude 4 $\mathrm{N}$ is exerted on the book

see solution.

Physics 101 Mechanics

Chapter 4

Newton's Laws of Motion

Physics Basics

Motion Along a Straight Line

Motion in 2d or 3d

Rutgers, The State University of New Jersey

University of Washington

Hope College

University of Sheffield

Lectures

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very in this problem we have I'm a book lying in rest someone's hand that waits for news I was just fill out this lengthy paragraph Here we have a down force of four Newtons exerted on the book by the Earth. It is the for Nunes of the book is this weight which is a result of it's mass and gravity never force of magnitude Four mutants is exerted on the book by the hand Is this upward force a reactions of down force? No, The hand is not holding up the book in response to the book wing for Nunes, Reaction to the Force in part a is a force of magnitude for Nunes Next hour. Time of the reaction. So the hand is holding of the book politically. That's not the reactionary force, have you? The reaction force in part a is a part a The downward force of four Newtons is right on the book by the earth. So if we're gonna have in equal amounts reaction, we're gonna have force of four Newtons exerted on Yeah, the Earth by the book. My line disappeared, but instruction would be if the force was downward in a we had a downward force. So this is the reaction force that would be upward directions. The force and parties. Air forces Magnitude four Newtons Insert Johnson, Part B. We have ever force. If ordinance exerted on the book by the hand so the opposite would be exerted on the the hand by the book. It's direction is the party was talking about upward force us to be downward. The forces in Parts A and B are equal and opposite because of Newton's. Okay, so in Harpy A and B were talking about, the force is on the book in the hand of In. These forces are related to mass home interest gravity, So that makes them officer. Because of Newton's second well, forces are being see, which are the reactionary forces that have to be equal opposite to the force is in part a are equal and opposite because of Newton's third Law of Motion, and we're done

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