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The energy required to launch an orbitin...

The energy required to launch an orbiting satellite out of earth’s gravitational influence is more/less than the energy required to project a stationary object at the same height (as the satellite) out of earth’s influence.

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Choose the correct alternative: (ii) The energy required to launch an orbiting satellite out of the earth's gravitational influence is (more/less) than the energy required to project a stationary object at the same height (as the satellite) out of the earth's influence.

A body is projected vertically upwards with a kinetic energy which is half of the minimum kinetic energy required to escape the earth's gravitational attraction. Calculate the maximum height attained by the body. (Radius of the earth=R)

As you have learnt in the text ,a geostationary satellite orbits the earth at a height of nearly 36000 km from the surface of the earth. What is the potential due to earth's gravity at the site of this satellite? (Take the potential energy at infinity to be zero.) Mass of the earth= 6.0xx10^(24)kg , radius =6400 km.

NCERT BANGLISH-GRAVITATION-EXERCISES
  1. The formula –GMm(1/r(2) – 1/r(1)) is more/less accurate than the form...

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  2. Suppose there existed a planet that went around the Sun twice as fast ...

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  3. Io, one of the satellites of Jupiter, has an orbital period of 1.769 d...

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  4. Let us assume that our galaxy consists of 2.5 xx 10^(11) stars each of...

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  5. If the zero of potential energy is at infinity, the total energy of an...

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  6. The energy required to launch an orbiting satellite out of earth’s gra...

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  7. Does the escape speed of a body from the earth depend on (a) the mass ...

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  8. A comet orbits the sun in a highly elliptical orbit. Does the comet ha...

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  9. Which of the following symptoms is likely to afflict an astronaut in s...

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  10. For the above problem, the direction of the gravitational intensity at...

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  11. A rocket is fired from the earth towards the sun. At what distance fro...

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  12. How will you ‘weigh the sun’, that is estimate its mass? The mean orbi...

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  13. A Saturn year is 29.5 times the earth year. How far is the Saturn from...

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  14. A body weighs 63 N on the surface of the earth. What is the gravitatio...

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  15. Assuming the earth to be a sphere of uniform mass density, how much wo...

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

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  17. The escape speed of a projectile on the earth’s surface is 11.2 km s^(...

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  18. A satellite orbits the earth at a height of 400 km above the surface. ...

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  19. Two stars each of one solar mass (= 2 x× 10^(30) kg) are approaching e...

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  20. Two heavy spheres each of mass 100 kg and radius 0.10 m are placed 1.0...

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