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Choose the correct alternative: (ii) T...

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.

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Choose the correct alternative: (i) If the zero of potential energy is at infinity, the total energy of an orbiting satellite is negative of its (kinetic/potential) energy.

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)

Choose the correct alternative : (iv) The formula -GMm(1//r_2-1//r_1) is (more/less) accurate than the formula mg(r_2-r_1) for the difference of potential energy between two points r_2 and r_1 distance away from the centre of the earth.

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.

CHHAYA PUBLICATION-NEWTONIAN GRAVITATION AND PLANETARY MOTION-PROBLEM SET -I
  1. Show that if the earth stops rotating about its axis, then the acceler...

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  2. Choose the correct alternative : (i) Acceleration due to gravity (in...

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  3. Choose the correct alternative : (ii) Acceleration due to gravity (i...

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  4. Choose the correct alternative : (iii) Acceleration due to gravity i...

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  5. Choose the correct alternative : (iv) The formula -GMm(1//r2-1//r1) ...

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  6. If both the radius and the mean density of a planet are half the radi...

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  7. Calculate the angular velocity of the earth for which effective accele...

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  8. Find the percentage decrease in the weight of a body when taken 32 km...

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  9. The density of a planet is 1/3 rd that of the earth and its radius is ...

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  10. Determine the value of the escape velocity from the surface of the moo...

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  11. The radius of a planet is double than that of the earth but their aver...

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  12. How much energy would be needed for a body of mass 10 kg to escape fro...

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  13. The planet Mercury revolves around the sun once in 88 days. If the mea...

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  14. Two planets are revolving around a star and the ratio of their average...

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  15. An artificial satellite revolves around the earth in a circular path ...

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  16. Let us assume that our galaxy consists of 2.5xx10^(11) stars each of o...

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  17. Choose the correct alternative: (i) If the zero of potential energy ...

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  18. Choose the correct alternative: (ii) The energy required to launch a...

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  19. A satellite of mass 1000 kg moves in a circular orbit of radius 7000 k...

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  20. An artificial satellites is revolving at a height of 500 km above the ...

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