[填空题]
A hammer thrower accelerates ju;i 8 9xjucl v65h+afthe hammer from rest within four full 1 )xfi+c8,gafow:yw1 tjo vpt(k7 cy,turns (revoa8 7+oyfv,f)1(,1g pk icww jtxo:ytclutions) 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
