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When a body brought from infinity to r d...

 When a body brought from infinity to r distance, its potential energy ......
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A spring is stretched by 3 cm, its potential energy is U_1 . If the spring is stretched by 6 cm, its potential energy be that is stored in it is U_(2)="……"U_(1) . (Fill in the blank).

When you lift a box from the floor and put it on an almirah the potential energy of the box increases bu there is no change in its kinetic energy. Is it violation of conservation of energy ? Explain. (AS_(7))

When water rises in a capillary tube of radius r to height h, then its potential energy U_(1) if capillary tube of radius 2r is dipped in same water then potential energy of water is U_(2) then U_(1):U_(2) will be

Show that if a body is projected vertically upward from the surface of the earth so as to reach a height nR above the surface (i) the increase in its potential energy is ((n)/(n + 1)) mgR , (ii) the velocity with which it must be projected is sqrt((2ngR)/(n + 1)) , where r is the radius of the earth and m the mass of body.

Work done by a body against friction always results in a loss of its kinetic/potential energy .

In a hydrogen atom, the electron and proton are bound at a distance of about 0.53 Å (a) Estimate the potential energy of the system in eV, taking the zero of the potential energy at infinite separation of the electron from proton. (b) What is the minimum work required to free the electron, given that its kinetic energy in the orbit is half the magnitude of potential energy obtained in (a)? (c) What are the answers to (a) and (b) above if the zero of potential energy is taken at 1.06 Å separation?

What is the magnitude of potential energy at infinity distance ?

KUMAR PRAKASHAN-GRAVITATION-Section - C Objective Questions (VSQs)
  1. Find the kinetic energy needed to project a body of mass m from the su...

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  2. What is the escape velocity from a black hole ?

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  3. As astronaut dropped a spoon from outside spacecraft will the spoon re...

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  4. Give the name of first Indian Astronaut.

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  5. What is the frequency of oscillation of a  pendulum mounted in a lift ...

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  6. Distance of two planets from the sun are 10^11 m and 10^(10) m respec...

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  7. In Bohr’s model, the atomic radius of the first orbit is r. Then, the ...

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  8. If any satellite has kinetic energy 6 xx 10^(9)J , then what its poten...

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  9. A satellite has potential energy -8 xx 10^(9)J, then what is its bindi...

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  10. The ratio between Bohr radii is

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  11. What are the factors on which escape velocity depends on ?

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  12. The period of revolution of a satellite in an orbit becomes 8 times th...

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  13. Why rocket does not have escape energy ?

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  14. Why satellite does not have escape velocity ?

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  15. What is the direction of rotation of polar satellite ?

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  16. In what direction does earth rotate ?

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  17. Why we can observed a whole surface of earth with the help of polar sa...

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  18. When a body brought from infinity to r distance, its potential energy ...

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  19. Give the revolution period of our moon around the earth and rotation p...

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  20. What is the gravitational potential at infinity distance from the cent...

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