free fall

free fall

In mechanics, the state of a body that moves freely in any manner in the presence of gravity. The planets are in free fall in the gravitational field of the Sun. A body in free fall follows an orbit such that the sum of gravitational and inertial forces equals zero. See also gravitation; Newton's laws of motion.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on free fall, visit

Seen & Heard

What made you look up free fall? Please tell us what you were reading, watching or discussing that led you here.

Get Our Free Apps
Voice Search, Favorites,
Word of the Day, and More
Join Us on FB & Twitter
Get the Word of the Day and More