[填空题]
A small 650-gram ball on the end ofr bx5v1obajono(k t4 /-p +bu.: ;qc+ip x-* .r5olz .ywdgdcv a thin, light rod is rotated in a horizontal circle of radius 1.2 m. C;ci-+g5ycrd vz*l xw o .q:.dpalculate (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
