Gravitational Field and Gravitational Field Intensity – SLC Science

Download our Android App from Google Play Store and start reading Reference Notes Offline.

Gravitational FieldReference Notes | SLC
Gravitational Field and Gravitational Field Intensity
For: Science Class 10

The space around a mass over which it can exert gravitational force on other masses is called the gravitational field of the mass. The gravitational field intensity at a point in the gravitational field is defined as the force experienced by unit mass placed at that point. Its unit is N/Kg.

I = F / M ——— (a)
I = GM / d2 ——- (b)
I = GM / G2 ——- (c)

Gravitational field intensity I and acceleration due to gravity g are one and the same thing, so
W = ml ———— (d) [As W = mg]

Mass:
The amount of substance contained in a body is called the mass. The mass of the body is measured by using a physical balance or beam balance. It unit if kg in SI. The mass of the body is dependent upon the number of atoms and average mass of atoms present in the body.

Weight:
The weight of a body is defined as the force with which it is attracted towards the center of the earth. SI unit of weight is Newton (N). Its value changes from place to place as it depends on the acceleration due to gravity (g). It is a vector quantity.
W = mg ——- (a)

Weightlessness:
The weightlessness of a body is the state in which the body experiences that the body is not being attracted by any force

Freefall:
If a body is falling freely under the action of gravity alone neglecting air resistance, the motion is called freefall.

Differences between g and G:

GG
It is the acceleration produced on the body due to gravityIt is the force of attraction between two unit masses separated by 1m distance
Its unit is m/s2Its unit is Nm2/kg2
It is a vector quantityIt is a scalar quantity
Its value changes from place to place.It is universal and is fixed

Differences between Gravitation and Gravity:

GravitationGravity
It is universal forceIt is not universal
It occurs between any two bodies in the universeFor this one body must always be a planet or a satellite

Differences between Mass and Weight:

MassWeight
It is the amount of substance contained in a bodyIt is the force by which a body is attracted towards the center of the earth
It is a constant quantityIt varies from place to place
It is a scalar quantityIt is a vector quantity
Its unit is KgIts unit is N
It is measured by beam balanceIt is measured by spring balance

Posted By : MeroSpark | Comment RSS | Category : SLC Notes
Tag :

Post a Comment

Your email is never published nor shared. Required fields are marked *

*
*