Newton’s law of universal gravitation (10-2)

Question 1 of 5

Question

Center-to-center distance between the two objects

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Question

The gravitational forces are attractive: $\vec{F}_ {\mathrm{1\ on\ 2}}$ pulls object 2 toward object 1 and $\vec{F}_ {\mathrm{2\ on\ 1}}$ pulls object 1 toward object 2.

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Review

Just as for a charge moving in a uniform electric field, we can use our knowledge of gravitation to find an expression for the electric potential energy of two point charges $q_1$ and $q_2$ separated by a distance $r$ . In Section 10-2 we saw the following expression for the attractive gravitational force between two objects with masses $m_1$ and $m_2$ separated by a distance $r$ :