单词	centripetal force
释义	centripetal force Suppose that a particle P of mass m is moving with constant speed v in a circular path, with centre at the origin O and radius r0. Let P have polar coordinates (r0,θ). (See circular motion.) Then and the acceleration of the particle is in the direction towards O and has magnitude . It follows that, if P is acted on by a force F, this force is in the direction towards O and has magnitude mv2/r0. It is called the centripetal force.
随便看	nth-order partial derivative nth root nth root of unity n-tuple null hypothesis nullity null matrix null measure null sequence null set null set null space Nullstellensatz null vector number number field number line Numberphile number systems number theory numeral numerator numerical analysis numerical differentiation numerical integration

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