A book rests on a table. Which force opposes the gravitational force acting on the book?
Understand the Problem
The question is asking us to identify which force counteracts gravity preventing the book from falling through the table. We need to understand the different types of forces listed and how they apply to the situation of a book resting on a table.
Answer
The normal force opposes the gravitational force.
The force that opposes the gravitational force acting on a book resting on a table is the normal force. This force is exerted by the table, pushing upward on the book and preventing it from accelerating downwards.
Answer for screen readers
The force that opposes the gravitational force acting on a book resting on a table is the normal force. This force is exerted by the table, pushing upward on the book and preventing it from accelerating downwards.
More Information
The Normal Force is always perpendicular to the surface of contact.
Tips
A common mistake is thinking that the reaction force is the force acting on the Earth/table. The equal and opposite force is the force that table exerts on the book.
Sources
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