30 Amazing and Interesting Facts about Gravity | Amazing Facts 4U
- Objects with mass are attracted to each other, this is known as gravity.
- Gravity is by far the weakest of the four fundamental forces. The other three are electromagnetism; weak nuclear force, which governs how atoms decay; and strong nuclear force, which holds atomic nuclei together.
- Gravity is the force of attraction between all types of matter. It is an invisible force between two objects that cannot be turned off or blocked or changed in any way. Gravity attracts physical bodies with a force that is proportional to their mass. Also, the closer that two objects are together the stronger the gravity will be.
- Unlike the Force, with its dark and light sides, gravity has no duality; it only attracts, never repels.
- It is the gravity or gravitation that allows matter to remain intact. It is what makes our planet orbit the Sun and keeps the Moon orbiting the Earth, and it helps to form the tides. It gives weight to objects.
- Our bodies are pulled down onto the surface of the Earth by gravity. If there was no gravity we would float away like in space and we’d all have to be strapped down. If you kicked a ball, it would fly off forever. We certainly couldn’t live without gravity.
- The force of gravity 100 kilometers (62 miles) above Earth is just 3% less than at the Earth’s surface.
- Gravity also is important on a larger scale. It is the Sun’s gravity that keeps the Earth in orbit around the Sun. Life on Earth needs the Sun’s light and warmth to survive. Gravity helps the Earth to stay just the right distance from the Sun, so it’s not too hot or too cold.
- Isaac Newton’s revolutionary theories on gravity in 1665 were thought to be inspired by seeing an apple fall from a tree. He realized that the same forces that pull an apple downwards when falling from a tree were the same forces that kept the Moon in place in orbit around the Earth.
- To leave Earth’s gravitational pull behind, an object must travel 7 miles a second, our planet’s escape velocity.
- Passengers on amusement park rides and the International Space Station experience microgravity incorrectly known as zero gravity because they fall at the same speed as the vehicles.
- The amazing fact is that a dime-size magnet has enough electromagnetic force to overcome all of Earth’s gravity and stick to the fridge.
- Newton seeing falling apple led to the first inverse square law in science, this means an object twice as far away exerts a quarter of the gravitational pull.
- As per gravity’s inverse square law, the reach of gravitational attraction is technically infinite.
- The force of gravity accelerates everything at the same rate, regardless of weight. If you dropped balls of the same size but different weights from a rooftop, they would hit the ground at the same time.
- Einstein’s general theory of relativity was the first to treat gravity as a distortion of space-time, the “fabric” that physically embodies the universe. While Newton’s older law of universal gravitation is accurate in most scenarios, modern physics uses Albert Einstein’s general theory of relativity to describe gravity.
- Ocean tides are caused by the rotation of the Earth and the gravitational effects of the Moon and Sun.
- You would weigh one-sixth of your earth’s weight on the moon as the moon has less gravity.
- At some point when falling, the friction from the air will equal the force of gravity and the object will be at a constant speed. This is called the terminal velocity. For a skydiver, this speed is around 100 miles per hour!
- Amazingly on Saturn’s moon Titan, the atmosphere is so thick and the gravity so low that humans could actually fly through it by flapping “wings” attached to the arms.
- In zero gravity, a candle’s flame is round and blue.
- Amazingly the tallest possible mountains on a neutron star can only be about 5mm tall due to their gravity.
- NASA cannot bring birds into space because birds need gravity to swallow and will die in absence of gravity.
- Humans usually get the urge to pee when the bladder is just 1/3 full. But in zero gravity, the urge doesn’t come until the bladder is almost full.
- Food does not taste the same in space, since without gravity to pull fluids down, astronauts’ sinuses get clogged up and they can’t really taste much of anything.
- Due to changes in local gravity, a pendulum clock accurate at sea level will lose around 16 seconds per day if moved to an altitude of 4000 feet.
- Amazingly there is an empty point in space where the gravity from the earth and the Sun are equal, and objects can orbit it as if there was something there.
- A neutron star’s gravity bends light so dramatically that more than half of its surface is visible from a given point of view. In some cases, the gravity can be so extreme that the entire surface would be visible from certain vantage points.
- Amazingly the Earth’s gravitational force makes it impossible for mountains to be taller than 49,213 feet or 15 km.
- Humans could one day colonize other planets with two or even three times Earth’s gravity but at 4 times the Earth’s gravity or above, we would no longer be able to sustain sufficient blood flow to the brain.
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