Gravity is important because it is the force the holds everything in the universe together. Although it is the weakest of the four known natural forces, it is the most dominant of those forces. No matter the size of an object, it has a gravitational force that extends through all space.Continue Reading
Since the beginning of the universe, gravity has been present. Shortly after the Big Bang, gravity pulled atoms together to form the first stars and planets. It pulled the stars together to form galaxies and kept planets in orbit around their stars.
On Earth, gravity keeps people, buildings, air and water from floating into space. It causes the ocean tides and objects to fall to the ground.
Despite all the knowledge about what gravity does, no one fully understands how it works or why it exists. It is believed that gravity is the result of mass bending space instead of acting as a force, such as magnetism. Others believe objects exchange particles called gravitons that help create the gravitational attraction between the objects.
Both theories have plausible elements explaining how gravity works. Gravitons may bend space, or bending space may create gravitons. In his theory of relativity, Albert Einstein explained that gravity is more than a force, as the mass of an object causes the space around it to bend and curve.Learn more about Motion & Mechanics
Gravity is a force that attracts matter to other forms or matter; it is a very weak force. It is the weakest of the fundamental forces, according to scientists. It is even weaker than what is called the weak force.Full Answer >
The force of gravity between two objects can be increased by reducing the distance between them. The force of gravity is influenced by the masses of the two objects and the gap between them. Gravitational force generally increases as objects become more massive and draw closer together.Full Answer >
Objects fall at the same velocity regardless of their weight, if gravity is the only force acting upon them. In a vacuum, where air resistance has been eliminated, a bowling ball and a feather fall at the same speed.Full Answer >
The value 9.8 m/s^2 is the average acceleration of a falling object due to the force of gravity on Earth. The letter g represents this value the formula v=gt. With this constant and formula, the speed of an object is calculated at the time t in seconds after it is dropped.Full Answer >