Gravitation

• Universal law of Gravitation:

• Gravitational force of attraction between two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
• F ∝ M × m              M and m are masses of two bodies.
• $$\begin{gathered} F\propto \frac{1}{r^2} \\ F=\mathrm{G}\frac{Mm}{r^2} \end{gathered}$$

             G = 6.673 × 10^–11 Nm² kg^–2

• • Inverse square law
  • Weight is the gravitational force on an object.
  • The weightlessness in outer space happens because the weight of the orbiting body is used to provide the centripet…