A. An object has rotational inertia I. The object, initially at rest, begins to rotate with a constant angular acceleration of magnitude . What is the magnitude of the angular momentum L of the object after time t? Express your answer in terms of I, , and t.

B. A rigid, uniform bar with mass m and length b rotates about the axis passing through the midpoint of the bar perpendicular to the bar. The linear speed of the end points of the bar is v. What is the magnitude of the angular momentum L of the bar? Express your answer in terms of m, b, v, and appropriate constants.