Hey guys, Just want to make sure I'm doing everything right here with some simple calcs. My physics days are long gone and it's been a while since I looked at any of this stuff. A 10,000lb piece of equipment is placed on a flat surface. 2,000lbs horizontal pounds-force is required to move it (brakes on). Assuming the type of surface is the same, what slope/incline/decline does the equipment start sliding? The answer I have is quite simply; α = arcsin (2,000 / 10,000) α = 11.54 degrees Or, even simpler, since the coefficient of friction (more like sliding resistance) is 0.2, the slope is 20% which converts to 11.54 degrees. Please confirm that I have not yet gone senile. Thank you.