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State if each of the following statement...

State if each of the following statements is true or false. Give reasons for your answer.
Work done in the motion of a body over a closed loop is zero for every force in nature.

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NCERT GUJARATI-WORK, ENERGY AND POWER-EXERCISES
  1. State if each of the following statements is true or false. Give reaso...

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  2. State if each of the following statements is true or false. Give reaso...

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  3. State if each of the following statements is true or false. Give reaso...

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  4. State if each of the following statements is true or false. Give reaso...

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  5. Answer carefully, with reasons : In an elastic collision of two bill...

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  6. Answer carefully, with reasons : Is the total linear momentum conser...

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  7. Answer carefully, with reasons : What are the answers to (a) and (b)...

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  8. Answer carefully, with reasons : If the potential energy of two bill...

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  9. A body is initially at rest. It undergoes one-dimensional motion with ...

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  10. A body is moving unidirectionally under the influence of a source of c...

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  11. A body constrained to move along the z-axis of a coordinate system is ...

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  12. An electron and a proton are detected in a cosmic ray experiment, the ...

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  13. A rain drop of radius 2mm falls from a height of 500 m above the groun...

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  14. A molecule in a gas container hits a horizontal wall with speed 200 ms...

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  15. A pump on the ground floor of a building can pump up water to fill a t...

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  16. The bob A of a pendulum released from 30^(@) to the vertical hits anot...

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  17. The bob of a pendulum is released from a horizontal position. If the l...

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  18. A trolley of mass 300 kg carrying sandbag of 25 kg is moving uniformly...

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  19. A body of mass 0.5 kg travels in a straight line with velocity v= ax^(...

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  20. The blades of a windmill sweep out a circle of area A. If the wind f...

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