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Question
Suppose your writing desk is tilted a little, a book kept on it starts sliding down. The direction of frictional force acting on it is
Suppose your writing desk is tilted a little, a book kept on it starts sliding down. The direction of frictional force acting on it is
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Solution
The correct option is A upwards
When a book slides on the writing desk, a frictional force acts between the book and the surface of the desk. The direction of frictional force on the book is opposite to the direction of its motion and acts in upward direction, as shown in the following figure.
When a book slides on the writing desk, a frictional force acts between the book and the surface of the desk. The direction of frictional force on the book is opposite to the direction of its motion and acts in upward direction, as shown in the following figure.
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