[填空题]
A 70-cm-diameter wheel accelerates e*c -azsgx;v8 fq)ef-) *vha puniformly about its center xt w b8)eg 6gwfs/(r1- wwj4hbfrom 130 rpm to 280 rpm if(8hg /j4 gb-w61wxb)es wtrwn 4.0 s. Determine (a) its angular acceleration,$\approx$ $rad/s^2$(Round to one decimal places) (b) the radial and tangential components of the linear acceleration of a point on the edge of the wheel 2.0 s after it has started accelerating. $a_R$ $m/s^2$ $a_{tan}$ $m/s^2$
Post time 2025-2-18 20:00:22
