Top suggestions for An approximate model for a ceiling fan consists of a cylindrical disk with four thin rods extending from the disk’s center, as in Fig ure P8.41. The disk has mass 2.50 kg and radius 0.200 m. Each rod has mass 0.850 kg and is 0.750 m long. (a) Find the ceiling fan’s moment of inertia about a vertical axis through the disk’s center. (b) Fric tion exerts a constant torque of magnitude 0.115 N ? m on the fan as it rotates. Find the magnitude of the constant torque provided by the fan’s motor if the fan starts from rest and takes 15.0 s and 18.5 full revolutions to reach its maximum speed. |