gc physics textbook chapter 6 problems (id: ff0db962a)

本题目来源于试卷: gc physics textbook chapter 6 problems，类别为 IB物理学

[填空题]
(a) If the KE of an arrow is doubled, dm79+w8w f9zk,l n dwqr. f6uvby what factor has its speed incrh cu aw h;;xvw,*d;zy-eased? $ \sqrt{a}$ a =    (b) If its speed is doubled, by what factor does its KE increase?   

参考答案:
空格1: 2±2%  空格2: 4±2% 


本题详细解析:

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