Physics · Static and Kinetic friction, laws of friction, rolling friction
Suppose your writing desk is tilted a little, a book kept on it starts sliding d
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
- A. upwards
- B. downwards
- C. no direction
- D. cant say
Step-by-step solution
The book slides down the tilted desk. Frictional force always opposes the relative motion between surfaces. Since the book moves downward, friction acts upward along the incline to oppose the motion.
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