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[解題] 國三理化力

[ tutor ]13 留言, 推噓總分: +5

作者: iosteven - 發表於 2020/11/24 20:41(5年前)

1^F推phoneing: 假設g=1011/24 22:15

2^F→phoneing: 0.3x10x5 = 1/2x0.3x v^2 mgh=1/2mv^211/24 22:17

3^F→phoneing: 算出v=1011/24 22:17

4^F→phoneing: a= 2-(-10)/0.1 = 120 末速-初速(反向)/所經過的時間11/24 22:18

5^F→phoneing: F=ma=0.3x120=36(N)=3.6kgw11/24 22:18

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