N a force that acts inwards on any body that rotates or moves along a curved path and is directed towards the centre of curvature of the path or the axis of rotation 向心力 → compare centrifugal force
After some treatment of centripetal force, he deduces Kepler's third law.
在向心力的一些论述之后,他推出了开普勒的第三定律。
So for the water to be ejected from the fur, the centripetal force has to exceed the surface tension.
所以,要让水从皮毛弹出,向心力必须超过表面张力。
And there has to be here a force on the system, the gravitational force, which is the same as the centripetal force.
这个系统中,存在重力,和向心力相等。
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