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The potential energy of a particle in a ...

The potential energy of a particle in a force filled is `U=(A)/(r^(2))-(B)/(r )` where A and B are positive constants and .r. is the distance of particle from the centre of the field. For stable equilibrium, the distance of the particle is

A

A/B

B

B/A

C

`(B)/(2A)`

D

2A/B

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The correct Answer is:
D
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AAKASH SERIES-WORK POWER ENERGY-EXERCISE - 1A
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  3. The potential energy of a particle in a force filled is U=(A)/(r^(2))-...

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  4. A car of mass .m. starts from rest and accelerates so that the instant...

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  5. A particle of mass .m. is driven by a machine that delivers constant p...

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  6. Kinetic energy, with any reference, must be

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  7. Which of the following is a non - conservative force ?

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  8. A molecule of mass m of an ideal gas collides with the wall of a vesse...

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  9. If a spring extends by x on loading, then energy stored by the spring ...

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  10. A bullet is fired from a rifle. If the rifle recoils freely, then the ...

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  11. A boy carrying a box on his head is walking on a level road from one p...

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  12. Identify the false statement from the following.

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  13. The balades of a windmill sweep out a circle of area A. If the wind fl...

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  14. A particle with total energy E is moving in a potential energy region ...

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  15. A particle is acted upon by a force of constant magnitude which is alw...

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  16. A particle of mass m moving with velocity v collides with a stationary...

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  17. Two spheres A and B collide. If the momentum of A is doubled in the co...

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  18. Internal force can change

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  19. In head on elastic collision of two bodies of equal mass

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  20. Two bodies A and B of masses m(1) and m(2) moving with velocities V(1)...

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