[填空题]
A hammer thrower accelerates the hamm nrh+azmh02n9 /ozq: qer tscg96u07uyebz4t g z+j -hbu 97y.h wi a/ru;from rest within four full turns (revolutions) and releases it at a spe7 atwyh.94 - ic709zgy ru e;6g bsu/utu+bzhjed 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
