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 elasn/8j-x:k vk, jsb9+z6ggs+ssm:o bc-j /x xnz tic collision with a second bauxws.f / -i: bb2b7rixll (at rest) and rebounds in the opposite direction with a speed equal txbxwbui.2bfr s:i7- /o 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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