In classical mechanics, a central force on an object is a force whose magnitude only depends on the distance r of the object from the origin and is directed along the line joining them:
where is the force, F is a vector valued force function, F is a scalar valued force function, r is the position vector, ||r|| is its length, and = r/||r|| is the corresponding unit vector.
Equivalently, a force field is central if and only if it is spherically symmetric.
Read more about Central Force: Properties, Examples
Famous quotes containing the words central and/or force:
“Sweet weight,
in celebration of the woman I am
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and of the central creature and its delight
I sing for you. I dare to live.”
—Anne Sexton (1928–1974)
“The body, what is it, Father, but a sign
To love the force that grows us, to give back
What in Thy palm is senselessness and mud?”
—Karl Shapiro (b. 1913)