- Can we explain gravity?
- What would happen if there was no gravity?
- Why is the law of gravity important?
- What did Einstein mean by time is relative?
- What is the first law of gravity?
- Who discovered gravity?
- Is gravity a theory or a law?
- What is gravity in simple terms?
- Where is gravity the strongest?
- How did Einstein explain gravity?
- What is the value for gravity?
- What does E mc2 actually mean?
- Is gravity a fictitious force?
- How does gravity affect Newton’s first law?
- What is gravity and why is it important?
- What does law of gravity mean?
- What are the 3 laws of gravity?

## Can we explain gravity?

Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles.

Gravity is not just the attraction between objects and the Earth.

It is an attraction that exists between all objects, everywhere in the universe.

…

where G is called the Gravitational Constant..

## What would happen if there was no gravity?

With less gravity, it is harder to keep your body strong. If the Earth’s gravity is lost, all items held to the Earth’s surface by gravity would float away. That includes the atmosphere, water, people, cars and animals. If an object were secured strongly to the Earth, it would probably remain attached.

## Why is the law of gravity important?

Newton’s law of gravitation is simple equation, but devastatingly effective: plug in the numbers and you can predict the positions of all the planets, moons and comets you might ever want to watch, anywhere in the solar system and beyond. And it allowed us to add to those celestial bodies too, heralding the space age.

## What did Einstein mean by time is relative?

In the Special Theory of Relativity, Einstein determined that time is relative–in other words, the rate at which time passes depends on your frame of reference. … The faster a clock moves, the slower time passes according to someone in a different frame of reference.

## What is the first law of gravity?

Newton worked in many areas of mathematics and physics. He developed the theories of gravitation in 1666, when he was only 23 years old. … Newton’s first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force.

## Who discovered gravity?

Sir Isaac NewtonSir Isaac Newton was an English mathematician and mathematician and physicist who lived from 1642-1727. The legend is that Newton discovered Gravity when he saw a falling apple while thinking about the forces of nature.

## Is gravity a theory or a law?

A theory is an explanation of a natural phenomenon. Einstein’s General Theory of Relativity explains how gravity works by describing gravity as the effect of curvature of four dimensional spacetime. … So, we have both a law and a theory of gravity.

## What is gravity in simple terms?

The answer is gravity: an invisible force that pulls objects toward each other. … Objects with more mass have more gravity. Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth’s gravity comes from all its mass.

## Where is gravity the strongest?

Arctic OceanMount Nevado Huascarán in Peru has the lowest gravitational acceleration, at 9.7639 m/s2, while the highest is at the surface of the Arctic Ocean, at 9.8337 m/s2.

## How did Einstein explain gravity?

Einstein argued that gravity isn’t a force at all. He described it as a curvature of time and space caused by mass and energy. … Their math, laid down in 10 equations, explained how gravity could move around objects via a warped reality, accelerating without ever feeling any mysterious Newtonian forces.

## What is the value for gravity?

9.8 m/s2Its value is 9.8 m/s2 on Earth. That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2. When discussing the acceleration of gravity, it was mentioned that the value of g is dependent upon location. There are slight variations in the value of g about earth’s surface.

## What does E mc2 actually mean?

Energy equals mass times theEinstein’s Big Idea homepage. E = mc2. It’s the world’s most famous equation, but what does it really mean? “Energy equals mass times the speed of light squared.” On the most basic level, the equation says that energy and mass (matter) are interchangeable; they are different forms of the same thing.

## Is gravity a fictitious force?

General relativity is his theory of gravity, and gravity is certainly the paradigmatic example of a “real” force. The cornerstone of Einstein’s theory, however, is the proposition that gravity is itself a fictitious force (or, rather, that it is indistinguishable from a fictitious force).

## How does gravity affect Newton’s first law?

Newton’s Law of Gravity says that gravity is a force that acts between any two objects with mass, and that force increases if the mass increases and decreases if the distance between the two objects increases. This force is always attractive, that is, it always works to pull the objects closer together.

## What is gravity and why is it important?

Gravity is a very important force. Every object in space exerts a gravitational pull on every other, and so gravity influences the paths taken by everything traveling through space. It is the glue that holds together entire galaxies. It keeps planets in orbit.

## What does law of gravity mean?

noun Physics. a law stating that any two masses attract each other with a force equal to a constant (called the gravitational constant) multiplied by the product of the two masses and divided by the square of the distance between them.

## What are the 3 laws of gravity?

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.