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A body is projected up with a velocity e...

A body is projected up with a velocity equal to `3//4th` of the escape velocity from the surface of the earth. The height it reaches is (Radius of the earth is `R`)

A

10 R/9

B

9R/7

C

9R/8

D

10R/3

Text Solution

Verified by Experts

The correct Answer is:
B
`1/2mv_(e)^(2)=(mgh)/(1+h/R)`,
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NARAYNA-GRAVITATION-EXERCISE -I (H.W.)
  1. The escape velocity of an object on a planet whose radius is 4 times t...

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  2. The escape velocity of a sphere of mass m is given by

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  3. A body is projected up with a velocity equal to 3//4th of the escape v...

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  4. A spacecraft is launched in a circular orbit very close to earth. What...

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  5. If the escape velocity on the earth is 11.2km-s^-1, its value for a pl...

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  6. The escape velocity of a body from earth's surface is ve. The escape v...

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  7. The escape velocity of a body from the surface of the earth is V(1) an...

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  8. The ratio of the orbital speeds of two satellites of the earth if the ...

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  9. An artificial satellite is revolving in a circular orbit at height of ...

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  10. The mean radius of the orbit of a satellite is 4 times as great as tha...

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  11. If the mass of earth were 4 times the present mass, the mass of the mo...

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  12. A satellite of mass m revolves around the earth of mass M in a circula...

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  13. A satellite of mass m is revolving in a circular orbit of radius r. Th...

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  14. Two satellite of masses 40kg, 50kg are revolving around earth in diffe...

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  15. Angular momentum of a satellite revolving round the earth in a circula...

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  16. The K.E. of a satellite is 10^(4)J. It's P.E.is

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  17. The energy required to move a body of massm from an orbit of radius 3R...

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  18. K.E. of an orbiting satellite is K. The minimum additional K.E. requir...

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  19. Imagine a geo-stationary satellite of the earth which is used as an in...

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  20. The height of a geo-stationary satellite above the centre of the earth...

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