gc textbook chapter 8 Rotational Motion (id: 6a5cba8b7)

[填空题]
A hammer thrower accelerates the hammer from rest g-a34la sgxe1wic2lycy+e-c9v9c b8r pthin four full turns (revolutions) and releases it at a spee + yccbv9-c9yprc8le 2d 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} $

参考答案:
空格1: 10.8±2%  空格2: 13±2%  空格3: 653±2%  空格4: 4770±2%  空格5: 1.14±2% 


本题详细解析: