[填空题]
A hammer thrower accelerates the hammer from rest jquuu+.(rf( yuw 0skp:7g ;lx wit2v efpbx k*1 2p 45pn72qhk+mcu/k5i gh) owxzhin four full turns (revolu+ k7z2 i1vmw kp4ug* )5fph 5xbhpxqkcn2/o e2tions) and releases it at a speed of 28 $m/s$ Assuming a uniform rate of increase in angular velocity and a horizontal circular path of radius 1.20 m, calculate (a) the angular acceleration, $rad/s^2$ (b) the (linear) tangential acceleration, $m/s^2$ (c) the centripetal acceleration just before release, $m/s^2$ (d) the net force being exerted on the hammer by the athlete just before release, N (e) the angle of this force with respect to the radius of the circular motion. $^{\circ} $
Post time 2025-2-18 20:00:22
