Question

4. Suppose your writing desk is tilted a little. A book kept on it starts sliding down. Show the directio
acting on it.​

Answer 1

Frictional force always acts as opposite to the direction of motion.

Force of friction will be always parallel to the two surfaces in contact.

Thus, the direction of frictional force acting on the book is parallel to the tilted table & opposite to the direction of sliding of a book

Answer 2

Friction force acts as opposite to the

direction