图中F力对固定端转动方向是逆时针，所以力矩为 。https://p.ananas.chaoxing.com/star3/origin/73d96bd9d243839e5c20d4ca79a97b37.png
举一反三
- F力对A点的力矩和对B点的力矩 。https://p.ananas.chaoxing.com/star3/origin/589af6d7affa0c4bbe76f50af76e4ed5.png
- F力对A点产生顺时针转动，要保持平衡，A点必有一个逆时针力偶与之平衡。https://p.ananas.chaoxing.com/star3/origin/589af6d7affa0c4bbe76f50af76e4ed5.png
- 以下说法正确的是 https://p.ananas.chaoxing.com/star3/origin/32620d45b840963fcfd2a9e499329436.png https://p.ananas.chaoxing.com/star3/origin/be2489a6491756903a1a67528363e754.png https://p.ananas.chaoxing.com/star3/origin/c5d98544629d58d5c134ed8bc9743922.png https://p.ananas.chaoxing.com/star3/origin/eef7c4f0c58f9f292270fbd5e9600bd3.png
- 使,,,的值为https://p.ananas.chaoxing.com/star3/origin/7a71315286a845cd71d58a43d172d70e.pnghttps://p.ananas.chaoxing.com/star3/origin/82992dfd55feeb0dbc3accfc460e8e6f.pnghttps://p.ananas.chaoxing.com/star3/origin/d072c844f7cfa56460a42ea3424f0622.pnghttps://p.ananas.chaoxing.com/star3/origin/d03cce0f654cef79e0f8e9e14f223092.png
- 设[imgwidth="71"height="25"src="https://p.ananas.chaoxing.com/star3/origin/75ffa9533e6ab79bc0cfb8fd5a03fb9e.png"],则[imgwidth="39"height="23"src="https://p.ananas.chaoxing.com/star3/origin/424d5c9d46833a5ab8942dcd75ce5a8c.png"]在[imgwidth="37"height="21"src="https://p.ananas.chaoxing.com/star3/origin/9ee84cb4b1771fa6c046eaa6c45bb946.png"]上的平均值为(). A: imgwidth="16"height="45"src="https://p.ananas.chaoxing.com/star3/origin/f163ea87a82b79497196f437c30b8320.png">; B: ; C: ; D: .