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Potential energy is defined for...

Potential energy is defined for

A

non-conservative force only

B

conservative force only

C

both conservative & non-conservative forces

D

neither conservative nor non-conservative forces

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The correct Answer is:
B
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Gravitational force is a conservation and medium independent force. Its nature is attractive. Gravitational field intensity and gravitational potential gives information about gravitational fied in vector and scaler form respectively. Actually gravitational fied intensity is equal to the negative of the negative of teh potential gradient. potential energy is defined for only conservation force. it is also equal to the total energy in escaping condition. gravitational potential is either negative or zero but can never be positive due to attractive nature of gravitational force. A person brings a mass of 1 kg from infinity to a point A . Initially the mass was at rest but it moves with a speed of 2 m//s as it reaches A . The work done by the person on a mass is -3 J . The potential of A is:

Gravitational force is a conservation and medium independent force. Its nature is attractive. Gravitational field intensity and gravitational potential gives information about gravitational fied in vector and scaler form respectively. Actually gravitational fied intensity is equal to the negative of the negative of teh potential gradient. potential energy is defined for only conservation force. it is also equal to the total energy in escaping condition. gravitational potential is either negative or zero but can never be positive due to attractive nature of gravitational force. The gravitational potential inside a hollow sphere (mass M , radius R ) at a distance r from the centre is:

Gravitational force is a conservation and medium independent force. Its nature is attractive. Gravitational field intensity and gravitational potential gives information about gravitational fied in vector and scaler form respectively. Actually gravitational fied intensity is equal to the negative of the negative of teh potential gradient. potential energy is defined for only conservation force. it is also equal to the total energy in escaping condition. gravitational potential is either negative or zero but can never be positive due to attractive nature of gravitational force. Gravitational potential versus distance r graph is represented in figure. The magnitude of gravitational field intensity is equal to

A force is said to be conservative if work done by or agains the force depends only on initial and final positions of the body and not on the nature of path followed. A force is said to be non-conservative, if work done by or against the force in moving a body from one position to another, depeds on the path followed between these two positions. Potential energy is defined only for conservative forces. It does not exist for non-conservative forces. Read the above passage and answer the following question : (i) Give two examples, each for conservative and non-conservative forces. (ii) Potential energy does not exist for non-conservative forces. What does it imply ini day to day life ?

Match the following {: ( "Column I", " Column II"),(" (A) Example of conservative force ", "(p) Work done by all forces " ) ,("(B) Potential energy defined for only " , "(q) Force constant (spring constant)"), ("(C ) If two spring are stretched by same force, then ratio of their potential energy is in the inverse ratio of their " , "(r) Gravitational force"),("(D) Change in kinetic energy is equal ", "(s) Conservative force"):}

A : The potential energy can be defined only in conservative field. R : The value of potential energy depends on the reference level (level of zero potential energy).

Define gravitational potential energy. Write the formula for it .

NARAYNA-WORK POWER AND ENERGY-C.U.Q-Key
  1. An agent is moving a positively charged body towards another fixed pos...

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  2. Work done by force of static friction .

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  3. Potential energy is defined for

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  4. Which of the following forces is called a conservative force ?

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  5. Identify the non-conservative force in the following

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  6. If x,F and U denote the dispalcement, force acting on and potential en...

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  7. In the case of conservative force

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  8. The change in kinetic energy per unit 'space' (distance) is equal to

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  9. When the momentum of a body a doubled, the kinetic energy is

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  10. For the same kinetic energy, the momentum shall be maximum for which o...

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  11. If the momentum of a particle is plotted on X-axis and its kinetic ene...

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  12. When two identical balls are moving with equal speed in opposite direc...

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  13. The product of linear momentum and velocity of a blood represents.

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  14. The KE of a freely falling body

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  15. Consider the following two statements: A. Linear momentum of a syste...

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  16. Internal forces can change

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  17. If the force acting on a body is inversely proportional to its speed, ...

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  18. Which of the following graphs depicts the variation of KE of a ball bo...

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  19. Which of the following statements is correct?

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  20. Two bodies of unequal masses have same linear momentum. Which one has ...

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