J kg^-1 is the unit of ______.

The correct answer is Gravitational Potential.

Key Points

• Gravitational Potential is the amount of work done in bringing a unit mass from infinity to a point in the gravitational field.
• It is measured in joules per kilogram (J kg^-1).
• The gravitational potential at a point is negative because work is done by the gravitational force to bring the mass from infinity.
• Gravitational potential is a scalar quantity, which means it has magnitude but no direction.
• It helps in calculating the potential energy of a mass in a gravitational field.

Additional Information

• Gravitational Constant (G)
  • The gravitational constant, also known as G, is a fundamental physical constant denoted by the symbol G.
  • It is used in the calculation of gravitational forces between two bodies.
  • The value of G is approximately 6.674 × 10^-11 m³ kg^-1 s^-2.
• Gravitational Intensity
  • Gravitational intensity at a point is the force experienced by a unit mass placed at that point.
  • It is measured in newtons per kilogram (N kg^-1).
  • It is a vector quantity, having both magnitude and direction.
• Gravitational Potential Energy
  • Gravitational potential energy is the energy possessed by an object due to its position in a gravitational field.
  • It is calculated using the formula U = mgh, where m is mass, g is acceleration due to gravity, and h is height.
  • It is measured in joules (J).