Добавлено в закладки: 0
A plank, of length L=3.7 m and mass M=9.7 kg, rests on the ground and on a frictionless roller at the top of a wall of height h=1.60 m. The center of gravity of the plank is at its center. The plank remains in equilibrium for any value of θ≥58° but slips if θ≥58°.
