Here's why:
* Newton's Law of Universal Gravitation: This law states that every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
* Earth's Dominance: The Earth's mass is vastly larger than the mass of a brick or a sponge. This means the Earth's gravitational pull on these objects is significantly greater than the objects' gravitational pull on the Earth.
* Constant Acceleration: The acceleration due to gravity, denoted by 'g', is calculated using the Earth's mass and the radius of the Earth. Since these factors are constant, the acceleration due to gravity is the same for all objects near the Earth's surface, regardless of their mass.
However, the force of gravity acting on a brick and a sponge is different. This is because the force of gravity is directly proportional to the object's mass. A brick, having a larger mass, will experience a greater force of gravity than a sponge.
In simpler terms: Imagine dropping a brick and a sponge from the same height. They will both fall at the same rate (same acceleration due to gravity), but the brick will hit the ground with more force because it has a larger mass.
