Hello, I think I know how to do this question, but i'd really like to check that i'm interpreting what the question means correctly. 1. The problem statement, all variables and given/known data The drawing shows a baggage carousel at the airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 11.0m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0.760 and the angle θ of the slope is 36°. How much time is required for your suitcase to go around once? 2. Relevant equations 3. The attempt at a solution I can't provide the picture, but it is simply a cone with a slope of 36° to the horizontal with a suitcase partway down the sloped surface. The question provides a coefficient of static friction but since the suitcase isn't moving relative to the carousel, surely there's no friction, right? I've drawn free body diagrams and summed my forces in the x and y direction which all boil down to tanθ = v2 / rg Which is easily solvable for v and then simple enough to find time period T. I'm just a bit worried that I haven't used the information about friction in the question, but I can't actually see a reason to... Thanks!