[填空题]
A small 650-gram ball on the enl m;l6 q0su h+gw7aa6mdhl w.n0j /085g/yvcvxyp1uk k of a thin, light rod is rotated in a horizontal circle of radk1 0/wnv .ux5 ck8yg0/vplhj yius 1.2 m. Calculate (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
