As long as the book does not begin to move in any direction on the wall and just stays static on the wall under pressure in the same position, there is no role of friction while it stays there ! It is only when the book starts to move in a certain direction, that friction will be experienced in the opposite direction… And greater the vertically compressive force on the book is during its horizontal movement on the wall (with respect to the wall’s surface), greater will be the friction experienced in the opposite direction horizontally with respect to the wall’s surface ! Please note that in this situation of a book being pressed against a vertical wall, it is the force you exert vertically on the book that will act as its ‘weight equivalent’ on the wall and be the determinant of friction i
Sponsored by Software Advice
What’s the best LMS pricing model for you?
Get a free price quote for the LMS software you’re looking at.
Rami Islam, Student at Northwestern University (2017-present)
Answered 2 years ago
When you press the book against the wall, the book is exerting a force against the wall. The wall, in turn, is exerting an equal and opposite force on the book (normal force). This normal force, directed horizontally, produces a frictional force between the book and the wall. Since the book is still (and has zero acceleration), the net force on it is zero. Since gravity is pulling it down, the frictional force is thus equal in magnitude and directed upwards.
2.4K viewsView 2 Upvoters
Avinit Dutta, SEO Expert, Fitness enthusiast, Fitness Blogger
Answered 2 years ago · Author has 164 answers and 37.9K answer views
the answer should be upward. as you are pushing the book towards the wall, the wall is pushing the book back at you keeping it still, though if there wasn’t this upward force acting upon the book as friction, it would have pulled down by the gravity. hence there has to be an friction acting upward opposite to the gravity to keep it from falling
1.1K viewsView 2 Upvoters
Related Questions
More Answers Below
In which direction is friction exerted?
What is the direction of frictional force exerted by the surface when a person walks?
What is the direction of force of friction?
What is the magnitude of the average force exerted on the ball by the wall?
If you hit a wall with a force of 240N, how much force is exerted on you?
Fawad Hassan, Electrical Engineer
Answered 5 years ago · Author has 172 answers and 152.5K answer views
friction has two types. 1-static friction. 2-friction due to motion
static friction is always present (doesnt matter how low it is) between two physically contacting surfaces. while friction due to motion opposes the motion hence in the opposite direction of the force. now in this scenario static friction will always be there. frictional force will always oppose the force applied.
2.8K views
Sponsored by CapitalOne Shopping
The genius hack every Home Depot shopper should know.
Before you shop at The Home Depot, read this.
Curt Lindmark, lived in New Jersey, Born and Bred. (1971-2012)
Updated 2 years ago · Author has 410 answers and 178.3K answer views
Originally Answered: You press your physics textbook flat against a vertical wall with your hand. What is the direction of the friction force on the book exerted by the wall?
Friction always acts to oppose an acceleration.
“An object at rest stays at rest.”
In this case, gravity pulls down, your force pushing sideways on the book into the wall is opposed by the wall pushing back, and the coefficient of friction pushes upward to repell the pull of gravity.
432 views
Arash Mahmoudian
Answered 5 years ago
Originally Answered: If you press a book flat against a vertical wall with your hand, in what direction is the friction force exerted by the wall on the book?
Up
1K viewsView 3 Upvoters
Related Questions
In what direction does the force of friction always push?
What direction is a force exerted on the wire?
Did your hand exert a force on the wall?
What is the direction of the force exerted by man?
A block weighing W is held against a vertical wall by pressing horizontally with a force F .What is the force needed to hold the block?
In which direction is friction exerted?
What is the direction of frictional force exerted by the surface when a person walks?
What is the direction of force of friction?
What is the magnitude of the average force exerted on the ball by the wall?
If you hit a wall with a force of 240N, how much force is exerted on you?
A bin is pulled 10m with a 50N force. If there is a 20N friction, what will be the work exerted by the 50 N force, by the friction, and the overall work?
Explanation:
