[填空题]
A 70-cm-diameter wheel accelerates unife+ j2ooip 4zi.ormly about its center from 6fjht wi6vt e-. c(ff4130 rpm to 280 rpm in 4.0 s. Deteiwh(f tffc6.v64 e j-trmine (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
