This "trick" invovles quickly pulling a table cloth from under plates. One would expect the plates to move with the table cloth but in reality the plates stay in their original position.
I know in terms of Physics this has to do with the plate's inertia, but my teacher wants a more advanced explanation.
Please give a more advanced explanation in terms of physics
2007-12-30 03:01:00 · 3 answers · asked by akanthasy 1 in Science & Mathematics ➔ Physics
F = m * Δv / t ; horizontal force pulling table cloth from under plates
F = μ m g ; friction force holding dishes
μ m g => m * Δv / t
The greater the velocity of the horizontal force, or the smaller time it takes to do it, the more chance of overwhelming the friction forces between table, cloth, and dishes.
2007-12-30 03:44:40 · answer #1 · answered by MR.B 5 · 1⤊ 0⤋
The normal (Fn) is acting on the plates as they're sitting on the table. Inertia is telling the plates to continue going to the way they want without any other forces acting on it. In this case, a force is acting on it but it's too fast.
That's why the plates stay in place.
2007-12-30 03:35:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋
http://www.thenakedscientists.com/forum/index.php?topic=7778
2007-12-30 03:21:33 · answer #3 · answered by paul h 7 · 0⤊ 0⤋