Gravitational energy is the movement of an object or mass that is caused by the pull of gravity. This is caused on Earth by the strong attraction of all other masses to be drawn back to Earth's center. An example of gravitational energy is water from a river tumbling over a cliff to form a waterfall.Continue Reading
When an object is lifted from the ground, energy is created and stored in the objects' gravitational field. The amount of energy stored is directly related to the distance between the object and the ground. The higher an object is lifted, the more the energy is stored in the gravitational field and the more energy that object produces as it returns to Earth.
Gravitational energy is often harnessed and used as a source of clean power for consumption. Hydro power is energy produced by the force of falling water, such as water in a reservoir behind a dam. When the dam is open and water is allowed to pass through to lower ground, the energy from the force created is accessible. The Hoover Dam in Arizona can produce more than 2,000 megawatts of capacity by utilizing gravitational energy. The average yearly generation of 4.5 billion kilowatt hours serve the electrical needs of approximately 8 million people in parts of Arizona, California and Nevada.Learn more about Motion & Mechanics
There are two formulas that may be used to calculate mass: mass is equal to the volume of an object multiplied by its density (m=v*d) and mass is equivalent to an object's weight divided by the acceleration of gravity (m=w/g). The appropriate formula depends on the available variables.Full Answer >
An object's gravitational potential energy is equal to the product of the object's mass times the gravitational field strength times its height (PEgrav = mass * gravity * height). The strength of Earth's gravitational field is 9.8 meters per second, and height is measured starting from a specified surface.Full Answer >
Albert Einstein's formula "E=mc2" means energy equals the mass of an object multiplied by the speed of light squared. His theory means that the mass of an object, no matter how small, can be transformed into a tremendous amount of energy.Full Answer >
A perpetual, or self-winding, watch keeps itself wound using a component called a rotor which is moved by gravity when the arm swings or moves and is connected to gears that translate the movement to circular motion within the watch. These watches usually generate enough energy from movement to keep themselves running for one and a half to two days even when sitting still.Full Answer >