[填空题]
A hammer thrower accelerates the hammer from//y,mb n0ynqulmt44 v rest within four fm7gcz2)ofx9 ifkdq6 6ull turns (revolutions) and releases it at2oc)i6 m fkdq76xfz9g 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} $
