What is the difference between G and g in Physics ?

Answer 1

G is Newton's universal gravitational constant in the formula

F=GMm/r^2

Or

G = Fr^2 / Mm

Where M and m are two masses and r is the distance between the two masses.

The unit of G is N*m^2*kg^(-2).

If we consider a unit mass and calculate the force exerted on this unit mass by the mass M,

F / m = GM / r^2

If r is fixed then F/ m becomes a constant.

If we write F/m = g

g = G M / r^2.

Thus the relation between g and G is given by the above equation.

The unit of g is m/s^2.

G is a universal constant which is independent of M m and r,

where as g is a constant which depends upon M and r.

g is force per unit mass or acceleration. It has dimensions of 1in length and -2 in time and 0 in mass.

G has a dimension of 3 in length -1 in mass and -2 in time and has no special name for this quantity.

Answer 2

G is the gravitational constant. The gravitational force between two bodies of masses m1 & m2, separated by a distance d is given by:

F = G.m1.m2/d^2

The value of G is 6.674 X 10^(-11) N.m^2/kg^2. This is a universal constant.

g is the the acceleration due to gravity. This varies, even on the earth from place to place. An average value may be taken as 9.807 m/sec^2.

Answer 3

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You need to be more clear. Can you explain where you seen these written so we can better answer the question. But here's my guess: G is the Universal Gravitational Constant And i think G-s means G multiplied by s s is displacement (distance) I must admit though, I've never seen G-s anywhere. The second one G's could mean acceleration due to gravity, but it should be written with a lowercase g. g = 9.8 m/s 2g's - 19.6 m/s 3g's = 29.4 m/s And so on. Hope this helped.

Answer 4

Value Of G In Physics

Answer 5

Isaac Newton's law of universal gravitation proposed that the gravitational attraction between any two object is directly proportional to the product of their masses and inversely proportional to the distance between their centers. In equation form, this is often expressed as follows:
E= G *M*m/d^2

in this equation G is the universal gravitation constant and its value is 6.67259 x 10-11 N m2/kg2.

And "g" is referred to as the acceleration of gravity. It's value is 9.8 m/s2 on Earth.
g= G*M(earth)/d^2

Answer 6

g is usually reserved for the acceleration due to gravity
g = 9.81 m/s^2
G is the universal gravitational constant used in the force equation between two masses F = G [m1m2/d^2].
G = 6.672e-11 N m^2 kg^-2

If you set your weight (mg) equal to the force equation between two masses (one you and the other the earth) you can solve for g.

Answer 7

G is Newton's universal gravitational constant in the formula F=GMm/r^2. Numerically it's 6.67x10^-11 in SI units. g is the acceleration caused by gravity. Here at the Earth's surface, it's 9.81m/s^2.

Answer 8

G is the force acting between two forces in earth.It is a universal gravitational constant.its value is app. equal to 6.6734*10^-11Nm^2/kg^2.

On the other hand,'g' is the acceleration developed by a body when falling freely under the influence of gravity.It is not a universal constant and depends on external factors.

Answer 9

RE:
What is the difference between G and g in Physics ?

Answer 10

'G' is the universal constant of gravitation,it is the force of attraction between any two unit masses separated by unit distance.it is a constant neither a scalar or vector quantity.its SI unit is 6.7 m square/kg square

'g' is the acceleration of a body falling under free fall due to gravity.it is independent of mass of the falling body.it depends of height of the object and mass q acceleration body