A. Derive the Moment of Inertia of an irregular triangle with respect to its Neutral axis. b. Derive the Moment of Inertia of an irregular triangle with respect to a line passing through its top vertex and parallel to the x-axis. The height of the triangle is h and its base is b. Its base is located on the x-axis. None of its angles is 90°.

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.