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The graph below shows the net torque exerted on a rigid object as a function of time. Which of the following claims about the angular impulse delivered to the object during the interval shown in the graph is TRUE? Two forces of equal magnitude are exerted at separate times to a board that is initially at rest and free to rotate about an axis at one end of the board, as shown below. In Figure 1, a force of magnitude F is exerted perpendicular to the board at the center of the board for a time 2t, after which the board has a final angular momentum about the axis of magnitude L1. In Figure 2, the board is returned to rest at its initial position and a force of magnitude F is exerted at a constant angle to the board of 60o at the end of the board for time t, after which the board has a final angular momentum about the axis of magnitude L2. Which of the following is equal to the ratio L2:L1? The wheel on a vehicle has a rotational inertia of 2 kg∙m2. At the instant the wheel has a counterclockwise (CCW) angular velocity of 6 rad/s, an average counterclockwise (CCW) torque of 5 N∙m is applied, and continues for 4 s.