In class, one sophisticated and expensive demonstration the class would see is where I lifted one end of the table until my book started to slide, then kept the angle fixed. Suppose the coefficient of kinetic friction was μk = 0.490, and the 1.35 kg book started sliding from rest at an angle of 39.7o. What would the speed of the book at the bottom of the 1.27 m long table?
5.03 m/s
2.85 m/s
2.55 m/s
1.28 m/s