Question

A book is lying on the horizontal table top. If we tilt the table a little, then the book starts sliding down slowly. This happens because:
A. sliding friction is greater than static friction
B. sliding friction is less than force of gravity
C. static friction is greater than sliding friction
D. force of gravity is less than sliding friction

Answer 1

Answer:

A)sliding friction is greater than static friction.

Explanation:

Ist of all if we talk about the static friction and sliding friction then we define static friction as the friction which is in the body at times of rest,when the body is at stationary position because of the static friction and when the body comes in motion at that time the sliding friction occurs

And now when we tilt a table little the book starts falling because static friction is less than sliding friction

Answer 2

C. static friction is greater than sliding friction

Explanation:

Friction is a phenomenon which resists motion when an object is rubbed against another. Sliding friction is between two objects when one or both are sliding against each other. In this case, the book is sliding down the titled table. So the motion is directed downwards. So the friction will act on the book in the direction opposite to movement. So friction will act upwards. Sliding friction is less than static friction, so when the table is titled, the book starts to slide.

Option C is the answer