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
If a book lying on the horizontal table-top starts sliding down slowly on tilting the table a little, This happens because sliding friction is less than the force of gravity.
So, option (b) is correct.
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