gc textbook chapter 7 Linear Momentum (id: 7e7d9136e)

本题目来源于试卷: gc textbook chapter 7 Linear Momentum，类别为 通用国际物理

[填空题]
A ball of mass m makes a head-on,ye7p82ej2sg 6jk v ka elastic collision with a second balh r81nsocv5* sl;y 4vml (at rest) and rebounds in the opposite direction with a speed equalyo1mv;l rc*n5v4shs 8 to one-fourth its original speed. What is the mass of the second ball? $m_B$ =    $m_A$(Round to two decimal places)

参考答案: 1.67±2%


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