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Find the kinetic energy needed to projec...

Find the kinetic energy needed to project a body of mass m from the centre of a ring of mass M and radius R so that it will never comne back.

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The correct Answer is:
`(GMm)/(R )`
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BANSAL-GRAVITATION-Practice Exercise
  1. For particles of equal masses M that move along a circle of radius R u...

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  2. In a double star, two stars (one of mass m and the other of mass 2m) d...

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  3. Two concentric spherical shells have masses m(1), m(2) and radii R(1),...

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  4. A particle takes a time t(1) to move down a straight tunnel from the s...

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  5. a solid sphere of mass m and radius r is placed inside a hollow thin s...

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  6. The mass of earth is 80 times that of moon. Their diameters are 12800 ...

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  7. The diameter of a planet is four times that of the earth. Find the tim...

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  8. A tunnel is dug along a chord of the earth. a perpendicular distance R...

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  9. Find the height over the earth\'s surface at which the weight of a bod...

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  10. Find the kinetic energy needed to project a body of mass m from the ce...

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  11. How much work is done in circulateing a small object of mass m around ...

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  12. Find the gravitational potential due to a hemispherical cup of mass M ...

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  13. Find the gravitational potential energy of system consisting of unifor...

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  14. Two satellites A and B of the same mass are orbiting the earth at alti...

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  15. A satellite is to revolve around the earth in a circle of radius 8000 ...

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  16. A sky laboratory of mass 2 xx 10^(3) kg has to be lifted from one circ...

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  17. A planet of mass M moves around the sun along an ellipse so that its m...

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  18. What should be the orbit radius of a communications satellite so that ...

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