Search Results

19 results for “gravity”

Formulae (19)

Gravitational Potential Energy

PE = mgh

Energy stored due to height in a gravitational field.

PhysicsIntermediate

Newton's Gravitation

F = G\frac{m_1 m_2}{r^2}

Attractive force between two masses.

PhysicsBasic

Weight

W = mg

The gravitational force on a mass.

PhysicsBasic

Weight

W = mg

Gravitational force on a mass near Earth.

PhysicsAdvanced

Gravitational Potential Energy (General)

U = -\frac{GMm}{r}

Potential energy of two masses at distance r.

PhysicsAdvanced

Orbital Velocity

v = \sqrt{\frac{GM}{r}}

Speed needed for a circular orbit.

PhysicsAdvanced

Escape Velocity

v_e = \sqrt{\frac{2GM}{r}}

Minimum speed to escape a gravitational field.

PhysicsAdvanced

Terminal Velocity

v_t = \sqrt{\frac{2mg}{\rho A C_d}}

Constant fall speed when drag balances gravity.

Physics Laws & TheoremsIntermediate

Law of Universal Gravitation

F = G\frac{m_1 m_2}{r^2}

Every mass attracts every other mass.

Fluid MechanicsBasic

Specific Gravity

SG = \frac{\rho}{\rho_{water}}

Density relative to water.

Nutrition & FoodAdvanced

Alcohol by Volume (ABV)

ABV = (OG - FG) \times 131.25

Estimated alcohol content of beer or wine from gravity readings.

Astronomy & SpaceIntermediate

Escape Velocity

v_e = \sqrt{\frac{2GM}{r}}

Minimum speed to escape a body's gravity.

Astronomy & SpaceIntermediate

Orbital Velocity

v = \sqrt{\frac{GM}{r}}

Speed of a circular orbit.

Astronomy & SpaceIntermediate

Surface Gravity

g = \frac{GM}{r^2}

Gravitational acceleration at a body's surface.

Astronomy & SpaceIntermediate

Newton's Law of Gravitation

F = G\frac{m_1 m_2}{r^2}

The attractive force between any two masses.

Astronomy & SpaceAdvanced

Gravitational Potential Energy

U = -\frac{GMm}{r}

Energy of a mass in another body's gravitational field.

Astronomy & SpaceAdvanced

Photon Sphere Radius

r_{ph} = \frac{3GM}{c^2}

Radius where gravity bends light into a circular orbit.

Astronomy & SpaceAdvanced

Gravitational Redshift

z \approx \frac{GM}{rc^2}

Fractional stretching of light climbing out of gravity.

Astronomy & SpaceAdvanced

Hill Sphere Radius

r_H \approx a\left(\frac{m}{3M}\right)^{1/3}

The zone where a body's gravity dominates over its host's.