Gravity attracts objects that have mass and pulls them toward the center of the Earth. Everything on Earth is held by gravity including the atmosphere. More »

The weight of an object is the measure of the force of gravity on that object. The calculation of the weight of an object takes into account both the object's mass and gravitational force. More »

Gravity is the force that keeps all of the planets, dwarf planets, moons, asteroids and comets orbiting the Sun. The force of gravity is inversely proportional to the distance of any two objects. This means that objects ... More »

Gravity pulls objects downward, toward the Earth’s center, so anything that flies must counteract gravity’s pull. Using forward thrust and the lift provided by wings, an airplane overcomes the effects of gravity and flie... More »

The force of gravity on Earth is approximately 9.8 m/s2. The exact gravitational force, which is described as the acceleration of gravity, differs based on latitude and altitude of a specific point on Earth. For example,... More »

Gravity affects weight because gravity creates weight. Objects have mass, which is defined as how much matter an object contains. Weight is defined as the pull of gravity on mass. More »

Gravity is a type of force that attracts objects to one another. Objects with more mass have more of a gravitational pull than those with less mass. The pull of gravity also depends on the distance between two objects. T... More » Science Physics Motion & Mechanics