Gravitational Field
TheGravitational field is the space around the planet up to where the effect of gravity can be felt.
Gravitational field Intensity (I)
It is the force experienced by a unit mass of an object, within the gravitational field. Its SI unit is N/kg
The gravitational field intensity is calculated by using following formula:
If the object is on the surface I =
If the object is at height H =
If the object is at certain distance d =
Neutral point
They are the points which border the space with the gravitational field.Neutral points are those points in the space at where the gravitational field intensity is zero.The artificial satellites which have launched from the earth generally revolve around the neutral points.
 Gravitational field is the space around the planet up to where the effect of gravity can be felt.
 When a unit mass experience a force within a gravitational field then, the force is called gravitational field intensity.
 The place which is the border between the gravitational field and space is called neutral point.
The gravitational field depends on the mass of the planet.
Gravitational field intensity is measured in N/Kg unit.
Let,
The gravitational field intensity of the earth = E_{1}
The gravitational field intensity of the earth when it is squeezed to the size of the moon = E_{2}
Radius of the earth (R_{1})= 63.8 × 10^{5} m
Radius of the moon (R_{2})= 1.7 × 10^{6} m
We have, \
or,
or,
or,
or,
or,
or,
or,E_{2} = 14.08 E_{1}
Thus, the gravitational field intensity of the earth will increase by about 14 times, if it is squeezed to the size of the moon.
The space around a planet where the gravity of the planet has its influence on an object is the gravitational field.

Which of the following formula is correct to calculate gravitational field intensity?
I = GM/d
I= mass/ force experienced
I = GM/ R
I= force experienced/ mass

______ are the points which border the space with gravitational field
Gravitational field intensity
Gravity
Neutral point
All of above

What is the unit of Gravitational field intensity?
Newton per meter
Meter per second
Newton per second
Newton per kilogram

Gravitional field is defined as _______.
The space around a mass over which it can exert gravitational force on other masses.
The point experienced in a feely falling body due to the force of gravity.
The space aound object over which it can experience gravity.
The point experienced by unit mass placed at that point.

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