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Mass of the earth is 81 times has mass o...

Mass of the earth is 81 times has mass of the moon. The distance between earth and moon is `4xx10^5` km. calculate the position of the point on the line joining the centres of earth and moon where the gravitational field is zero.

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The correct Answer is:
`3.42xx10^5km`
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Let's fill in the gaps. Distance between earth and moon is 384, 000,000 m. = 384 xx 10^?m.

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The planet Mercury revolves around the sun once in 88 days. If the mean distance between the earth and the sun is 1.5 xx10^8 km , what is the mean distance of Mercury from the sun ?

The average distance of the sun from the earth is 1.5xx10^8 km and the average distance of the moon from the earth is 384000 km. if the attraction of the sun on the earth is 180 times the attraction of the moon ,how many times is the mass of the sun greater than that of the moon ?

The ratio of the mass of the moon to that of the earth is 1:81. If the radius of the moon is assumed to be one-fourth of that of the earth , then what is the acceleration due to gravity on the surface of the moon in terms of that on the earth's surface ? Hence, find the escape velocity from the surface of the moon in terms of that from the earth's surface.

The diameter of the moon is 3450 km and its distance from the earth is 3.8xx10^(5)km. What will be the diameter of the image of the moon formed by a convex mirror of focal length 7.6 m ?

CHHAYA PUBLICATION-NEWTONIAN GRAVITATION AND PLANETARY MOTION-PROBLEM SET -II
  1. The distance the sun and the earth is 1.5xx10^8 km. At what point on ...

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  2. A spherical mass of 20 kg lying on the earth's surface is attracted by...

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  3. Mass of the earth is 81 times has mass of the moon. The distance betwe...

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  4. The radius of earth is 6.37xx10^6 m, its mean density is 5.5 g*cm^(-3)...

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  5. If the acceleration due to gravity at a altitude h (h lt lt R) above t...

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  6. Assume that the earth is a uniform sphere of radius R. If the acceler...

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  7. Assume that the earth is a uniform sphere of radius R. If the acceler...

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  8. The acceleration due to gravity at a hill station is less by 0.05% wi...

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  9. If the span of a day on the earth would have been 6 days, what would b...

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  10. A body of mass m is raised to a height h from a point on the surface o...

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  11. How much below the surface of earth does acceleration due to gravity b...

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  12. The ratio of the mass of the moon to that of the earth is 1:81. If th...

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  13. A rocket is fired vertically with a speed of 5 km *s^(-1) from the ear...

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  14. A rocket starts vertically upward with speed v0. Show that its speed...

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  15. A body is projected vertically upwards from the surface of earth with ...

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  16. The moon revolves around the earth once in 271/3 days. If the average ...

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  17. A satellite is revolving around the earth at an altitude of 700 km. De...

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  18. The radius of the earth = R. if a geostationary satellite is revolving...

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  19. An artificial satellite circled around the earth at a distance of 340...

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  20. An artificial satellite is moving in a circular orbit around the earth...

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