Table of Contents
What is G in GM r2?
gravitational constant
g = GM/r2, Where M is the mass of the Earth, r the radius of the Earth (or distance between the center of the Earth and you, standing on its surface), and G is the gravitational constant. G (without the subscripts) is the gravitational constant, and c is the speed of light.
What is the accurate value of G?
| standard acceleration of gravity | |
|---|---|
| Numerical value | 9.806 65 m s-2 |
| Standard uncertainty | (exact) |
| Relative standard uncertainty | (exact) |
| Concise form | 9.806 65 m s-2 |
What does G 9.81 s2 mean?
Gravity of
It has an approximate value of 9.81 m/s2, which means that, ignoring the effects of air resistance, the speed of an object falling freely near the Earth’s surface will increase by about 9.81 metres (32.2 ft) per second every second. …
Can we measure gravity waves?
In 2015, scientists detected gravitational waves for the very first time. They used a very sensitive instrument called LIGO (Laser Interferometer Gravitational-Wave Observatory). These first gravitational waves happened when two black holes crashed into one another.
Which G value is more accurate?
So once a near equality in time period is obtained on both sides of the centre of gravity of the metallic bar, determining the length of the pendulum becomes more accurate, and so does determining the acceleration g due to gravity.
What is the most accurate value of gravity?
A matter of fact, this quantity known as the acceleration of gravity is such an important quantity that physicists have a special symbol to denote it – the symbol g. The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
Is Earth’s gravity constant?
9.807 m/s²
Earth/Gravity
How far does Earth’s gravity reach?
This means 2x as far away gravity is 1/4th as strong. This extends forever. (ok, technically right now Earth’s gravity would only reach out to about 5 billion light years.