(Solved): A snall block oits at one end of a flat board that is Part A 4.00 \( \mathrm{m} \) long. The coefic ...

A snall block oits at one end of a flat board that is Part A 4.00 \( \mathrm{m} \) long. The coeficients of friction between the block and the board are \( \mu_{4}=0.500 \) and In \( =0.400 \). The end of the board where the biock: rits is slowly raised until the angle the board makes with the harizontal in \( \alpha_{0} \), and then the block starts Express your anawer with the approprlate units. to slide down the beard.