You are pushing a textbook (with a purely horizontal force) against the wall of

Question

You are pushing a textbook (with a purely horizontal force) against the wall of your classroom. You push sufficiently hard that the book does not slip and fall. How is it possible for you to exert a horizontal force that keeps the book from undergoing a vertical acceleration? Explain in some detail. As always, to get full credit on this you must post a complete and thoughtful response by the due date. You need not respond to anyone else, but should feel free to do so. Reply Subject (hidden) Author (hidden) This post cannot be viewed by you, probably because you have not posted in the discussion, the maximum editing time hasn't passed yet, the discussion has not started or the discussion has expired.

Explanation / Answer

this is possible if there is a friction between book and wall.when ahorizontal force sufficient is applied

then normal force N=F

u=coefficient of between wall and book .the weight of the book which acts vertically downward is balanced by friction.

friction=mg

uF=mg

here m=mass of book.so one can hold a book by pressing with a sufficient horizontal force,

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