gravity) acting on an object of some mass. In an idealized scenario where the only independent variable is time, the second law is effectively an “ordinary differential equation,” which one can solve ...

[6 Weird Facts About Gravity] "It's a very elegant equation ... This is in contrast with more familiar linear partial differential equations, such as the heat equation, the wave equation ...

[6 Weird Facts About Gravity] "It's a very elegant equation ... This is in contrast with more familiar linear partial differential equations, such as the heat equation, the wave equation, ...