Universal law of gravity

Definition of: Newton's Law of Universal Gravitation

Every particle with mass in the universe attracts every other particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.

Definition of: Weight

The gravitational force the Earth exerts on any object on or near its surface.

Definition of: Gravitational Field

The force acting per unit mass.

Definition of: Mass

The amount of matter which an object is made of.

[Gravity] Explain this formula

• F is the weight (N) of the object. • m is the mass (kg) of the object. • g is the gravitational acceleration (m·s⁻²) which the object experiences.

[Gravity] Explain this formula

• F is the attractive force (N) between the two particles. • G is the Universal Gravitational constant (6,7 x 10⁻¹¹ N·m²·kg⁻²). • m₁ and m₂ are the masses (kg) of the particles. • r is the distance (m) between the centres of the particles.

[Gravity] Explain this formula

• g is the gravitational acceleration (m·s⁻²) at a given point. • G is the Universal Gravitational constant (6,7 x 10⁻¹¹ N·m²·kg⁻²). • m₂ represents the mass (kg) of the planet/large object. • r is the distance (m) between the centres of the objects. • The mass of the small object plays no part in determining the gravitational acceleration, but the mass of the planet/large object does.