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Gravitational Field
Force per unit mass acting on an object.
Force due to Gravity
Attractive force between all masses.
Weight
Force acting on an object due to gravity.
Gravitational Field Strength (g)
Force per unit mass at a point.
Gravitational Field Equation
g = Fg / m, where Fg is weight.
Mass (m)
Amount of matter in an object (kg).
Force (F)
Weight of an object due to gravity (N).
Gravitational Field Direction
Always towards the center of mass.
Non-repulsive Forces
Gravitational forces cannot repel objects.
Large g Value
Indicates stronger gravitational force per mass.
Weight on Jupiter
Significantly larger than weight on Earth.
Gravitational Constant (G)
Newton's constant for universal gravitation.
Radial Fields
Non-uniform fields with strength decreasing with distance.
Uniform Fields
Gravitational field strength is constant throughout.
Gravitational Field Lines
Represent direction and magnitude of gravitational fields.
Parallel Field Lines
Indicate a uniform gravitational field.
Radial Field Lines
Directed radially inwards towards a point mass.
Earth's Gravitational Field
Almost uniform near the surface of Earth.
Field Line Arrows
Indicate direction of gravitational force (attractive).
Gravitational Field Strength Decrease
Strength decreases with distance from mass center.
Calculation of Mass
m = Fg / g, using weight and g.
Examiner Tip
Distinguish between g (field strength) and G (constant).
