[填空题]
A hammer thrower accelerates the hammer from restq10mvmvxr)fed6q3t za( a //x1ji :jhu;+;t x1 g;w4 nwjxhvi within four full turns (revolutions) and releases it at a speed of 28 jx;xj;w+;n:jw1ih 4 hi1v gut$m/s$ 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} $
