申論題

4. The figure is an overhead view of a 4.0 kg meter stick that can rotate around a pivot located at the mark of "20 cm". Four horizontal forces act on the stick (the forces maintain their orientations relative to the stick as the stick rotates). The stick starts from rest at time t = 0 s. What is its angular speed (rad/s) at time t = 6.0 s? Don't round-off early. For a uniform stick rotating around its center of mass, the rotational inertial is given by ML²/12, where M is the mass and L is the length._____