Physics Unit4: Force Dynamics & Newton's Laws (id: 549a2fac4)

本题目来源于试卷: Physics Unit4: Force Dynamics & Newton's Laws，类别为 通用国际物理

[单选题]
A stack of books rests2:6dktt3i c5v0x xfno on a level frictionless surface. A fp r: 3ki)xmqg bj,rz47orce F acts on the stack, and it accelerat m ,jip7:4xgr)3rzkbqes at $3.0m/s^2$. A 1.0 kg book is then added to the stack. The same force is applied, and now the stack accelerates at $2.0m/s^2$. What was the mass of the original stack?

A. $1.0kg$
B. $2.0kg$
C. $3.0kg$
D. none of the above


参考答案:  B


本题详细解析: 暂无

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