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What do you know about gravity?

What is the formula for the law of gravitation?

A

F=m1m2r2G

B

F=r2Gm1m2

C

F=rG(m1+m2)

D

F=Gr2M

What does 'G' represent in the law of gravitation formula?

A

Acceleration due to gravity

B

Mass of the object

C

Gravitational constant

D

Distance between the objects

What happens to the gravitational force if the distance between two objects doubles?

A

It becomes one-fourth of the original force

B

It becomes half of the original force

C

It remains the same

D

It doubles

The gravitational force between a star of mass M and a planet of mass m is F. What would the force (F_2) be between the star and a planet of mass 3m and 4 times the distance?

Newton's law of gravitation assumes all bodies to be point masses i.e. they have no size. What are the correct conditions under which an extended body can be assumed to be a point mass?

A

The distance separating the masses is significantly large.

B

The masses have a similar magnitude.

C

The density of each mass is the same

D

The masses are spherically symmetric.

What do gravitational field lines around a spherical mass represent?

A

lines where gravitational potential energy is the same

B

The force of gravity

C

The distance between different points in space

D

The direction of the force experienced by a mass

What do equipotential surfaces for gravity indicate?

A

Areas of maximum gravity

B

Points with different gravitational forces

C

Points with the same gravitational potential

D

Locations of zero gravity

How is gravitational field strength related to distance from a spherical mass?

A

It increases with increasing distance from the mass

B

It is unrelated to distance from the mass

C

It remains constant at all distances

D

It decreases with increasing distance from the mass

Given that the radius of the earth is

m, and g=9.81 N/kg . What is the mass of the Earth?

m, and g=9.81 N/kg . What is the mass of the Earth?

6.4⋅106

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