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The radius and acceleration due to gravi...

The radius and acceleration due to gravity of the moon are `1/4` and `1/5` that of the earth, the ratio of the mass of the earth to mass of the moon is

A

`1:80`

B

`80:1`

C

`1:20`

D

`20:1`

Text Solution

Verified by Experts

The correct Answer is:
B
`g=(GM)/(R^(2))implies g alpha M/(R^(2))`
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NARAYNA-GRAVITATION-EXERCISE -II (H.W.)
  1. The difference in the value of g at poles and at a sphere of latitude,...

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  2. The angular velocity of the earth's rotation about its axis is omega. ...

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  3. The radius and acceleration due to gravity of the moon are 1/4 and 1/5...

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  4. The difference in the value of g at poles and at a latitude is 3/4R om...

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  5. A particle hanging from a spring stratches it by 1cm at earth's surfac...

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  6. A tunnel is dug along a diameter of the earth. Find the force on a par...

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  7. The mass of the earth is 9 times that of the mars. The radius of the e...

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  8. The escape velocity of a body from the earth is 11.2 km//s. If a body ...

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  9. A particle is kept at rest at a distance R (earth's radius) above the ...

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  10. 16 kg and 9kg are separated by 25m. The velocity with which a body sho...

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  11. The escape velocity from the earth is about 11 km/s. The escape veloci...

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  12. The escape velocity for a planet is ve. A particle starts from rest at...

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  13. The speed of a satellite that revolves around earth at a height 3R fro...

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  14. If an artificial satellite is moving in a circular orbit around earth ...

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  15. Two satellites A and B go around a planet in circular orbits of radii ...

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  16. A satellite is moving on a circular path of radius r around earth has ...

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  17. A satellite is orbiting the earth in an orbit with a velocity 4 km//s,...

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  18. A stone is dropped from a height equal to 3R, above the surface of ear...

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  19. If g is the acceleration due to gravity on the earth's surface, the ga...

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  20. The work done in bringing three particles each of mass 10 g from a lar...

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