Gravitation — Chapter Summary

Every particle in the universe attracts

Every particle in the universe attracts every other particle with a force. This force is always attractive and acts along the line joining the two par

The force between two particles

The force between two particles is proportional to the product of their masses and inversely proportional to the square of the distance between them:

The gravitational force due to earth

The gravitational force due to earth is called gravity.

A falling body is accelerated by

A falling body is accelerated by earth’s gravity. This acceleration is called acceleration due to gravity and is written as g. The force of gravity on

For constant g

For constant g, the equations of uniformly accelerated motion become v = u + gt, s = ut + (1/2)gt^2, and v^2 = u^2 + 2gs. For upward motion, g is take