A bottle is placed on a sheet of paper at the edge of a table. The sheet is pulled slowly at first but very quickly when it has reached the very end of the edge. The bottle remains on the table. Why does this happen? I think what happens in the initial condition (when it's still pulled slowly) is that there is static frictional force between bottle and the paper which makes the bottle goes the same way as the paper. But, when the paper is pulled very quickly, the frictional force becomes kinetic frictional force. Since the coefficient of kinetic friction is much less than the static one, the acceleration of the bottle becomes very very small so the bottle doesn't fall off the table. But, after googling (https://www.quora.com/What-is-the-principle-behind-the-table-cloth-trick), I found out that it's due to the inertial resistance. What is actually inertial resistance? Is it a force or a vector? What's the formula? I really don't get it.