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The escape velocity of a body from the e...

The escape velocity of a body from the earth is `11.2 km//s`. If a body is projected with a velocity twice its escape velocity, then the velocity of the body at infinity is (in `km//s`)

A

19.4

B

194

C

1.94

D

0.194

Text Solution

Verified by Experts

The correct Answer is:
A
Velocity at infinity
`v_(oo) =sqrt(v^(2)-v_(e)^(2))=sqrt([2(11.2)]^(2)-(11.2)^(2))`
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NARAYNA-GRAVITATION-EXERCISE -II (H.W.)
  1. A particle hanging from a spring stratches it by 1cm at earth's surfac...

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  2. A tunnel is dug along a diameter of the earth. Find the force on a par...

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  3. The mass of the earth is 9 times that of the mars. The radius of the e...

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  4. The escape velocity of a body from the earth is 11.2 km//s. If a body ...

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  5. A particle is kept at rest at a distance R (earth's radius) above the ...

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  6. 16 kg and 9kg are separated by 25m. The velocity with which a body sho...

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  7. The escape velocity from the earth is about 11 km/s. The escape veloci...

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  8. The escape velocity for a planet is ve. A particle starts from rest at...

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  9. The speed of a satellite that revolves around earth at a height 3R fro...

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  10. If an artificial satellite is moving in a circular orbit around earth ...

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  11. Two satellites A and B go around a planet in circular orbits of radii ...

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  12. A satellite is moving on a circular path of radius r around earth has ...

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  13. A satellite is orbiting the earth in an orbit with a velocity 4 km//s,...

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  14. A stone is dropped from a height equal to 3R, above the surface of ear...

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  15. If g is the acceleration due to gravity on the earth's surface, the ga...

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  16. The work done in bringing three particles each of mass 10 g from a lar...

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  17. The energy required to shift the body revolving around a planet from r...

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  18. By what percent the energy of the satellite has to be increased to shi...

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  19. At what height from the surface of the earth, the total energy of sate...

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  20. A point P (Rsqrt(3)m,0,) lies on the axis of a ring of mass M and radi...

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