[填空题]
A small 650-gram ball on the end of w*l/ xp*9/ dxkg6;q; xskc3 zcemiyk1 a thin, light rod is rotated in.jw p*18vn4xhc ;+wfribz 3mu a horizontal circlbcwru+ v4i n8wm*.z3hxf 1jp;e of radius 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
