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A particle falls on earth : (i) from i...

A particle falls on earth :
(i) from infinity. (ii) from a height 10 times the radius of earth. The ratio of the velocities gained on reaching at the earth's surface is :

A

`sqrt(11) : sqrt(10)`

B

`sqrt(10) : sqrt(11)`

C

`10 : 11`

D

`11 : 10`

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The correct Answer is:
A
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ALLEN -GRAVITATION-EXERCISE 1
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  2. The imaginary angular velocity of the earth for which the effective ac...

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  3. A particle falls on earth : (i) from infinity. (ii) from a height 10...

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  4. Two different masses are droped from same heights. When these just str...

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  5. By which curve will be variation of gravitational potential of a hollo...

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  6. Gravitational potential difference between surface of a planet and a p...

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  7. If M(e) is the mass of earth and M(m) is the mass of moon (M(e)=81 M(m...

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  8. The gravitational potential energy is maximum at :

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  9. A missile is launched with a velocity less than the escape velocity. T...

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  10. A body attains a height equal to the radius of the earth when projecte...

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  11. The gravitational potential energy of a body at a distance r from the ...

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  12. A particle falls towards the earth from inifinity. The velocity with w...

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  13. A projectile of mass m is thrown vertically up with an initial velocit...

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  14. Two small and heavy spheres, each of mass M, are placed a distance r a...

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  15. An artificial satellite moving in a circular orbit around the earth ha...

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  16. A particle of mass m is moving in a horizontal circle of radius R unde...

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  17. Potential energy of a 3kg body at the surface of a planet is -54 J, th...

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  18. Escape velocity of a body 1 kg mass on a planet is 100 ms^(-1). Gravit...

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  19. The ratio of radii of two satellites is p and the ratio of their accel...

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  20. The escape velocity for a body projected vertically upwards from the s...

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