Question

Is Earth's gravity decreasing?

Answer 1

Explanation:

1. The force that pulls items toward the center of a planet or other entity is called gravity. All of the planets are kept in orbit around the sun by the force of gravity.
2. Gravity is depending upon the mass of the planet.
3. Mathematically
   $$\begin{gathered} {\mathrm{g}}^{\text{'}}=\mathrm{g}-{\mathrm{R\omega }}^2{\cos }^2\mathrm{\alpha } \\ \mathrm{Where}{\mathrm{g}}^{\text{'}}\mathrm{is}\mathrm{net}\mathrm{acceleration}\mathrm{due}\mathrm{to}\mathrm{gravity},\mathrm{g}\mathrm{is}\mathrm{acceleration}\mathrm{due}\mathrm{to}\mathrm{gravity} \\ \mathrm{R}\mathrm{is}\mathrm{radius}\mathrm{of}\mathrm{earth},\mathrm{\omega }\mathrm{is}\mathrm{angular}\mathrm{speed},\mathrm{\alpha }\mathrm{is}\mathrm{angle}\mathrm{of}\mathrm{latitude} \end{gathered}$$
4. The eath angular speed is decreasing with time. This will decrease net gravity.

Hence, Earth's gravity is decreasing.