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
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
downwards
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
no direction
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
cant say
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
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.