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力的分解

> （9分）质量为m=19kg的物体放在水平地面上，物体与地面之间的动摩擦因数为0.25。（1）如图甲所示，对物体施加一个多大的水平力F 1，可使物体在地面上匀速运动？（2）如图乙所示，如果对物体施加一个与水平方向成37°斜向上的力F 2，则F 2多大时才可使物体在地面上匀速运动？（已知sin37°=0.6，cos37°=0.8。）

问题：

发布时间：2024-09-07

（9分）质量为m=19kg的物体放在水平地面上，物体与地面之间的动摩擦因数为0.25。

（1）如图甲所示，对物体施加一个多大的水平力F ₁，可使物体在地面上匀速运动？
（2）如图乙所示，如果对物体施加一个与水平方向成37°斜向上的力F ₂，则F ₂多大时才可使物体在地面上匀速运动？（已知sin37°=0.6，cos37°=0.8。）

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