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A boy presses a book against the front w...

A boy presses a book against the front wall such that the book does not move. The force of friction between the wall and the book is

A

Towards right

B

Towards left

C

Downwards

D

Upwards

Text Solution

Verified by Experts

The correct Answer is:
D
The various forces acting on the book are as shown in the figure.

where, f Frictional force
W = Weight of a book
F = Applied force
N = Normal reaction
From figure ,
The direction of force of friction between the wall and the book is upwards.
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