[填空题]
A hammer thrower accele+l /fyqiue2)j g:w30c1ixy lhrates8pfwd:h:0ds.drcj, n w82g t1 u7eb dc the hammer from rest within four full turns (revolutions) and releases it at a spepedcb7j 2s w0dr h8 8fdu.1td:cw:,gn ed 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} $
