Potential energy of two masses becomes zero when:

Variation of g with height h:

Acceleration due to gravity is independent of:

Orbital speed in circular orbit is:

If Earth shrinks to half radius with same mass, g becomes:

Potential energy curve of gravitation is:

Gravitational potential at ∞:

Escape velocity on planet with density ρ is proportional to:

Force between two masses doubles if:

Kepler’s first law: orbit is:

Value of g at depth R/2 is:

If a body goes to height R, g becomes:

Weight becomes maximum at:

A body at Earth’s surface weighs W. At 2R it weighs:

Density of planet doubled with same radius, g becomes:

A satellite is raised but kinetic energy is unchanged. Its speed:

Two masses separated by r have potential energy:

Orbital energy is:

Time period of satellite T ∝:

Work needed to lift mass m from R to 2R is:

Gravitational potential inside uniform sphere varies as:

Weight of a body at center of Earth is:

Gravitational potential is:

A mass M and m have force F. If r increases to 3r, force becomes:

Work by gravity on satellite in circular orbit is:

Escape velocity depends on:

g is maximum at:

Kinetic energy of orbiting satellite is:

If angular momentum L is constant, r and v relation:

Escape velocity does not depend on:

Gravitational force between two masses becomes half if distance becomes:

Orbital speed in circular orbit is:

Escape velocity of Earth is ~11.2 km/s. If mass doubles, new vₑ:

If orbital radius becomes 4r, orbital speed becomes:

Gravitational intensity is:

Gravitational potential energy is minimum at:

Force at Earth's center is:

A geostationary satellite has period:

A satellite in elliptical orbit moves fastest at:

g on top of mountain decreases because:

Weightlessness occurs when:

If height increases, potential energy:

Escape velocity on Moon vs Earth:

Satellite total energy in orbit is:

A satellite with higher radius has: