gc physics textbook chapter 4 problems (id: 3f78e63ba)

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]
According to a simplifiedvd;kh2(saozr2 n sq7 8 model or b ur2yuo *3ob((fka ,4n(krvf a mammalian heart, at each pulse approximately34,ru vbo2(rr*ku(n( okfbay 20 g of blood is accelerated from 0.25 $\mathrm{~m} / \mathrm{s}$ to 0.35 $\mathrm{~m} / \mathrm{s}$ during a period of 0.10 s . What is the magnitude of the force exerted by the heart muscle?   

参考答案: 1.3±2%


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