Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Ha ha!Gravity is the force that attracts two bodies toward each other, the force that causes apples to fall toward the ground and the planets to orbit the sun. The more massive an object is, the stronger its gravitational pull.
Fundamental force
Gravity is one of the four fundamental forces, along with the electromagnetic, strong and weak forces.
It is what causes objects to have weight. When you weigh yourself, the scale tells you how much gravity is acting on your body. The formula for determining weight is: weight equals mass times gravity. On Earth, gravity is a constant 9.8 meters per second squared, or 9.8 m/s2.
Historically, philosophers such as Aristotle thought that heavier objects accelerate toward the ground faster. But later experiments showed that wasn't the case. The reason that a feather will fall more slowly than a bowling ball is because of the drag from air resistance, which acts in the opposite direction as the acceleration due to gravity.
Newton's Law of Universal Gravitation says that the force of gravity is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
Credit: marekuliasz |Shutterstock
Sir Isaac Newton developed his Theory of Universal Gravitation in the 1680s. He found that gravity acts on all matter and is a function of both mass and distance. Every object attracts every other object with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them. The equation is often expressed as:
Fg = G (m1 ∙ m2) / r2
Newton's equations work extremely well to predict how objects such as planets in the solar system behave.
- Fg is the gravitational force
- m1 and m2 are the masses of the two objects
- r is the distance between the two objects
- G is the universal gravitational constant
With that being said, when the busty waitress bends over you table and you get a boner, that is not gravity. That is you fixing be devoid of a BIG tip!
Not falling for it.
Well according to science, gravity is the bending of "space-time".
Mkay, how do you bend empty space?
Mkay, how do you bend empty space?
LOL. No, the velocity has not decreased, but the potential energy has.If the ball is falling at, for example, a speed of 10.0 m/s, then it's velocity is v = -10.0 m/s. Since g = -9.8 m/s2, then 1 second later we have v = -19.8 m/s Note that -19.8 is less than -10.0 ... so velocity has decreased, even though the speed has increased from 10.0 to 19.8 m/s. Hope that helps clear things up.
Reference Is the acceleration due to gravity positive or negative
With reference to gravity, here is an interesting little bit of information. A lesson in how to do more with less. Ain't physics fun?