| Area | Force | Potential Energy
|
|---|
| Gravity
| $$ \mathbf F_j = { m_j } \color{fuchsia} { G \sum { m_i \over r_{ij}^2 } } {\hat r_{ij} } $$
| $$ U_j = { m_j } G \sum { m_i \over r_{ij} } $$
|
Gravity
on Earth
| $$ \mathbf F_j = { m_j } \,\, \color{fuchsia} { g }\, $$
| $$ \Delta U_j = { m_j } \color{fuchsia} { g } \, \Delta r_{j} $$
|
|
| Electric
| $$ \mathbf F_j = { q_j} \color{fuchsia} { K \sum { q_i \over r_{ij}^2 } } {\hat r_{ij} } $$
| $$ U_j = {q_j} K \sum { q_i \over r_{ij} } $$
|
| $$ \mathbf F_j = { q_j} \, \color{fuchsia} {E} $$
| $$ U_j = { q_j} \, \color{fuchsia} {V(r_j)} $$
|
