[填空题]
A small 650-gram ball on the end of adk961u3jy x kj /fe/ilscj4jigj, -(t thin, light f**5uoab7 mv z,h7dw-k 6mhpvrod is rotated in a horizontal circle of radius 1.2 m. Calculfbmo 7awu6- ,v7 *h5p*zmvdhkate (a) the moment of inertia of the ball about the center of the circle, $kg \cdot m^2$ (b) the torque needed to keep the ball rotating at constant angular velocity if air resistance exerts a force of 0.020 N on the ball. Ignore the rod’s moment of inertia and air resistance. $m \cdot N$
Post time 2025-2-18 20:00:22
