本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理
[单选题]
An arrow of mass 20 g is shot horizontally into a bale of u+a ox:wch2qi(o4xa - hay u7n( m3dbz)gru x)pz0, striking the hay with a velocity of 60 m/s. It penetrates a depth of 20 cm before stopping. What is the average stopping for7x)bm(ug zr3n z p0ud)ce acting on the arrow?
A. $45 \; N$
B. $90 \; N$
C. $180 \; N$
D. $360 \; N$
参考答案: C
本题详细解析:
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