If the moon is to escape from the gravitational field of the earth forever, it will require a velocity ___ .

Slightly more than 11 . 2 km s - 1

E M B I B E

Physics Crash Course NEET>Chapter 6 - Gravitation>Level 2>Q 22

EASY

NEET

IMPORTANT

Earn 100

The earth is an approximate sphere. If the interior contained matter is not of the same density everywhere, then on the surface of the earth, the acceleration due to gravity

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Important Questions on Gravitation

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IMPORTANT

Physics Crash Course NEET>Chapter 6 - Gravitation>Level 2>Q 23

What will be the gravitational potential $(V)$ at a point between two bodies of masses $m$ and $M$ , kept at a distance $d$ apart, where the gravitational field due to them is zero.

EASY

NEET

IMPORTANT

Physics Crash Course NEET>Chapter 6 - Gravitation>Level 3>Q 1

The mass of the moon is

1 %

of the mass of earth. The ratio of the gravitational pull of the earth on the moon to that of the moon on earth will be,

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IMPORTANT

Physics Crash Course NEET>Chapter 6 - Gravitation>Level 3>Q 2

The ratio of the weights of a body on Earth’s surface to that on the surface of a planet is

9 : 4

The mass of the planet is

\frac{1}{9} t h

of that of the Earth. If

R

is the radius of the Earth, what is the radius of the planet? (Take the planets to have the same mass density)

EASY

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IMPORTANT

Physics Crash Course NEET>Chapter 6 - Gravitation>Level 3>Q 3

What is the gravitational potential at a point situated at

\frac{a}{2}

distance from the centre. A particle of mass

M

is situated at the centre of a spherical shell of same mass and radius

a

.

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Physics Crash Course NEET>Chapter 6 - Gravitation>Level 3>Q 4

Four particles each of mass

m

are placed at the vertices of a square of side

l

. The potential energy of the system is

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Physics Crash Course NEET>Chapter 6 - Gravitation>Level 3>Q 5

A uniform cable of mass

M

and length

L

is placed on a horizontal surface such that its

{(\frac{1}{n})}^{t h}

part is hanging below the edge of the surface. To lift the hanging part of the cable upto the surface, the work done should be:

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Physics Crash Course NEET>Chapter 6 - Gravitation>Level 3>Q 6

Consider two solid spheres of radii $R_{1} = 1 m$ , $R_{2} = 2 m$ and masses $M_{1}$ and $M_{2},$ respectively. The gravitational field due to sphere $(1)$ and $(2)$ are shown. The value of $\frac{M_{1}}{M_{2}}$ is: