Part C Learning Goal: To understand and apply the formula T = Ia to rigid objects rotating about a fixed axis. To find the acceleration a of a particle of mass m, we use Newton's second law: F mã, where Fnet is the net force acting on the net = particle. To find the angular acceleration a of a rigid object rotating about a fixed axis, we can use a similar formula: Tnet = = Ia, where Tnet = T is the net torque acting on the object and I is its moment of inertia. Now consider a similar situation, except that now the swing bar itself has mass mbar = 2.1 kg. The center of the mass of the bar is at its center, where the pivot is located. (Figure 2) Find the magnitude of the angular acceleration a of the seesaw. Express your answer numerically, keep 3 digits after the decimal point, in rad/s² ▸ View Available Hint(s) 肪 ΜΕ ΑΣΦΑ ? Figure #1 mbar 9822 new case swing bas has mass a = < 2 of 2 Submit Previous Answers × Incorrect; Try Again; 5 attempts remaining Part D In what direction will the seesaw rotate and what will the sign of the angular acceleration be? The rotation is in the clockwise direction and the angular acceleration is positive. The rotation is in the clockwise direction and the angular acceleration is negative. rad/s²

Part C Learning Goal: To understand and apply the formula T = Ia to rigid objects rotating about a fixed axis. To find the acceleration a of a particle of mass m, we use Newton's second law: F mã, where Fnet is the net force acting on the net = particle. To find the angular acceleration a of a rigid object rotating about a fixed axis, we can use a similar formula: Tnet = = Ia, where Tnet = T is the net torque acting on the object and I is its moment of inertia. Now consider a similar situation, except that now the swing bar itself has mass mbar = 2.1 kg. The center of the mass of the bar is at its center, where the pivot is located. (Figure 2) Find the magnitude of the angular acceleration a of the seesaw. Express your answer numerically, keep 3 digits after the decimal point, in rad/s² ▸ View Available Hint(s) 肪 ΜΕ ΑΣΦΑ ? Figure #1 mbar 9822 new case swing bas has mass a = < 2 of 2 Submit Previous Answers × Incorrect; Try Again; 5 attempts remaining Part D In what direction will the seesaw rotate and what will the sign of the angular acceleration be? The rotation is in the clockwise direction and the angular acceleration is positive. The rotation is in the clockwise direction and the angular acceleration is negative. rad/s²