A uniform meter stick balances on a fulcrum placed at the 40 cm mark when a weight W is placed at the 30 cm mark. What is the weight of the meter stick？

A.W

B.2W

C.W/2

D.0.4 W

E.4 W

F.5 W

提问人：网友qqqqqq 发布时间：2022-01-07

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· 有4位网友选择 A，占比44.44%
· 有2位网友选择 C，占比22.22%
· 有1位网友选择 B，占比11.11%
· 有1位网友选择 D，占比11.11%
· 有1位网友选择 E，占比11.11%

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