Concept explainers
Gravitational Attraction The gravitational attraction F on a body a distance r from the center of Earth, where r is greater than the radius of Earth, is a function of its mass m and the distance r as follows:
where R is the radius of Earth and g is the force of gravity—about 32 feet per .second per second (ft per sec2).
(a) Find and interpret Fm and Fr.
(b) Show that Fm > 0 and F, < 0. Why is this reasonable?
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