What is value of G in F = G m1 m2/r2

The correct answer is 6.672 × 10^-11 N m² kg^-2.

Key Points

• The gravitational constant, denoted by G, is a fundamental physical constant.
• Its value is 6.672 × 10^-11 N m² kg^-2.
• This constant is used in the formula F = G m₁ m₂ / r² to calculate the gravitational force between two masses.
• The unit of G is Newton meter squared per kilogram squared (N m² kg^-2).

Additional Information

• Gravitational Force:
  • Gravitational force is the attractive force between two masses.
  • It is described by Isaac Newton in his law of universal gravitation.
• Newton's Law of Universal Gravitation:
  • States that every point mass attracts every other point mass in the universe with a force that is directly proportional to the product of their masses.
  • The force is inversely proportional to the square of the distance between their centers.
• Applications of Gravitational Constant:
  • Used to calculate the gravitational force in various fields such as astrophysics and space exploration.
  • Essential in determining the orbits of planets and satellites.
• Measurement of G:
  • The value of G was first measured by Henry Cavendish in 1798.
  • It is one of the most difficult constants to measure with high accuracy.