gc physics textbook chapter 4 problems (id: e60825c13)

本题目来源于试卷: gc physics textbook chapter 4 problems，类别为 通用国际物理

[填空题]
What average force is needed to accelerate a 7.0t+lu *y)gq/oh 0-g bw(.a1u3)lkqk+ b srot:l a5eram pellet from rest to 125m/s over a dis+.5wlkb rae)a(os 1l kb3: quttance of 0.800 m along the barrel of a rifle?   

参考答案: 68.4±2%


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