#### IIT (NTSE/Olympiad)

# Gravitation

__Gravitational Field And Gravitational Field Intensity__

__Gravitational Field And Gravitational Field Intensity__

a) It is defined as the space around the attracting body, in which its attraction (gravitational) can be experienced.

b)

c) Gravitational field is a vector quantity.

d) Suppose a body of mass M is placed at a distance r, then intensity of gravitational field

at point P will be

e) Unit of gravitational field strength is Newton/kg or m/sec

f) As the distance (r) increases, gravitational field strength decreases. At r = ∞, value of intensity of gravitational field becomes zero.

g) Intensity of gravitational field at a distance r form the centre of earth is E = = g. I

E = = g, it is clear that the intensity of gravitational field at any place is equal to acceleration due to gravity.

h) Change of intensity of gravitational field due to a point mass with respect to distance -

E =

i) Relation between gravitational field and gravitational potential -

E = - ΔV ⇒ E = -

b)

**- it is defined as the force experienced by unit mass place at any point in the gravitational field.***Intensity of gravitational field or gravitational field strength*c) Gravitational field is a vector quantity.

d) Suppose a body of mass M is placed at a distance r, then intensity of gravitational field

at point P will be

e) Unit of gravitational field strength is Newton/kg or m/sec

^{2}. Dimension formula is [M^{0}L^{1}T^{-2}].f) As the distance (r) increases, gravitational field strength decreases. At r = ∞, value of intensity of gravitational field becomes zero.

g) Intensity of gravitational field at a distance r form the centre of earth is E = = g. I

**NOTE :**From this expressionE = = g, it is clear that the intensity of gravitational field at any place is equal to acceleration due to gravity.

h) Change of intensity of gravitational field due to a point mass with respect to distance -

E =

i) Relation between gravitational field and gravitational potential -

E = - ΔV ⇒ E = -

#### IIT (Class X)

- Unit, Dimension & Error

- Vectors

- Motion in One Dimension

- PROJECTILE MOTION

- NEWTON'S LAWS OF MOTION & FRICTION

- WORK, POWER, ENERGY & CONSERVATION LAWS

- CIRCULAR MOTION & ROTATIONAL DYNAMICS

- GRAVITATION