For the following question: A magician pulls a tablecloth out from under some dishes. *How far do the dishes move during the .25 seconds it takes to pull out the tablecloth? The coefficient of kinetic friction between the cloth and the dishes is .12 I think I got the answer right by considering the force of kinetic friction (to the right, normal up, weight down) so since kinetic friction is = to .12 * N then .12mg=ma giving .12g=a then I used displacement=.5at^2 and got .037 meters. *Now that I'm reviewing the problem I'm wondering why in the free body diagram you don't include the force of the tablecloth pulling out from under the dishes. *Sorry if this sounds like a dumb question but I looked online and though I can't check my answer in the back of the book, all other examples don't consider the table cloth pulling on the dishes so my question is why?