alleryStart learning →Every particle in the universe attracts every other particle along which line?
AA line at right angles to their motion
BA line tangent to the orbit path
CA line parallel to the Earth's axis
DA line joining the two particles
Answer & Solution
Correct answer: D. A line joining the two particles
1. Gravitation acts between every pair of particles in the universe, with no exceptions.
2. The force on each acts along the straight line that joins the two particles.
3. Because the pull lies along that line, gravitation is called a central force.
4. Its size then depends on the product of the masses and the inverse square of the separation.
_Source: OpenStax College Physics (CC BY 4.0), Ch 6 "Uniform Circular Motion and Gravitation", section 6.5 Newton's Universal Law of Gravitation_
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