Gravity and mass are closely related. In fact, mass is one of the fundamental properties that gives rise to gravity. Gravity is the force of attraction between objects with mass. The more massive an object is, the stronger its gravitational pull.
According to Newton's law of universal gravitation, the force of gravity between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Mathematically, it can be expressed as:
F = (G * m1 * m2) / r^2
Where: F is the force of gravity between the objects, G is the gravitational constant (a universal constant), m1 and m2 are the masses of the two objects, and r is the distance between their centers.
This equation shows that the force of gravity increases with increasing mass. Therefore, the more massive an object is, the stronger its gravitational force. For example, the Earth's mass is much larger than that of a human, so the Earth exerts a much stronger gravitational force on us than we do on each other.
It's important to note that mass is a measure of the amount of matter in an object and is different from weight. Weight is the force experienced by an object due to gravity and depends on the mass of the object and the acceleration due to gravity. The weight of an object can vary depending on the strength of gravity, while mass remains constant regardless of the gravitational field.