Table of Contents
How does the value of g change as one goes up above the surface of the earth?
So we can say that as we move upwards, then h increases, and since it is associated with a negative sign, the value of gh decreases and becomes less than g. Therefore gravity varies with height gh=g(1−2hR), and it decreases as we move above the surface of the earth.
Why does the value of g vary from place to place Class 9?
The gravitational potential at the surface of Earth is due mainly to the mass and rotation of Earth, but there are also small contributions from the distant Sun and Moon. As Earth rotates, those small contributions at any one place vary with time, and so the local value of g varies slightly.
Why does value of g vary with altitude?
Consider earth to be a sphere of radius R and mass M. Thus, as we go above the earth’s surface acceleration due to gravity goes on decreasing.
How does value of g change with the variation of depth?
Acceleration due to gravity decreases linearly with increase in depth. Acceleration due to gravity also decreases as we move above Earth’s surface. Thus, acceleration due to gravity is maximum at the Earth’s surface and is zero at the center of the Earth and at infinite distance above the Earth’s surface.
What is the exact 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 |
How is value of g calculated?
Its 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….The Value of g Depends on Location.
| Location | Distance from Earth’s center (m) | Value of g (m/s2) |
|---|---|---|
| Earth’s surface | 6.38 x 106 m | 9.8 |
| 1000 km above surface | 7.38 x 106 m | 7.33 |
How can we calculate value of g?
To calculate the force of gravity of an object, use the formula : force of gravity = mg, where m is the mass of the object and g is the acceleration of the object due to gravity. Since, g is always 9.8 m/s^2, just multiply the object’s mass by 9.8 and you’ll get its force of gravity.
What is the value of G at the center of the Earth?
For instance, if an object were moved to a location that is two earth-radii from the center of the earth – that is, two times 6.38×10 6 m – then a significantly different value of g will be found. As shown below, at twice the distance from the center of the earth, the value of g becomes 2.45 m/s 2.
Why does the G value vary at the equator and Poles?
These variations result from the varying density of the geologic structures below each specific surface location. They also result from the fact that the earth is not truly spherical; the earth’s surface is further from its center at the equator than it is at the poles. This would result in larger g values at the poles.
What is the variation of G due to the shape of Earth?
Variation of g due to Shape of Earth. As the earth is an oblate spheroid, its radius near the equator is more than its radius near poles. Since for a source mass, the acceleration due to gravity is inversely proportional to the square of the radius of the earth, it varies with latitude due to the shape of the earth. g p /g e = R 2 e /R 2 p
How do you find the acceleration due to gravity on Earth?
On the surface of the earth, the value of g is given by; g = 4/3 × πρRG At a distance (d) below the earth’s surface, the acceleration due to gravity is given by; g d = 4/3 × πρ × (R – d) G