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Work done in moving a body over a closed...

Work done in moving a body over a closed loop in zer'. Is this statement true for all forces?

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No, the statement is true only when motion is under conservative forces.
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Assertion : A work done in moving a body over a closed loop is zero for every force in nature. Reason : Work done does not depend on nature of force.

True / False type questions : It is necessary that the work done in the motion of a body over a closed loop is zero for every force in nature.

State if each of the following statements is true or false. Give reasons for your answer. a) In an elastic collision of two bodies, the momentum and energy of each body is conserved. b)Total energy of a systm is always conserved,no matter what internal and external forces on the body are present. Work done in the motion of a body over a closed loop is zero for every force in nature. d) In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the sytem.

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Statement - I: Work done in moving a body in non-uniform circular motion is zero. Statement - II: The centripetal force always acts along the radius of the circle

Assertion: Work done by the force of friction in moving a body around a closed loop is zero. Reason: Work done does not depend upon the nature of force.

PRADEEP-WORK, ENERGY AND POWER-Short Answer Question
  1. When a spring is compressed or stretched, what happens to its potentia...

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  2. Out of kilowatt hour and electron volt, which is bigger unit of energy...

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  3. Work done in moving a body over a closed loop in zer'. Is this stateme...

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  4. A rocket explodes in mid air. What happens to its total momentum and t...

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  5. A particle is moving in a circular path of given radius with number of...

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  6. Can you associate potential energy with a non conservative force ?

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  7. A spark is produced when two stones strike against each other. Why?

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  8. In an exothermic chemical reaction, is mass being converted into energ...

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  9. A hydrogen bomb is more powerful than an atom bomb. Why?

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  10. A constant power P is applied on a particle of mass m. find kinetic en...

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  11. A shot fired from a cannon explodes in air. What will be the changes i...

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  12. Explain with reason whether the potential energy in the following case...

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  13. Two springs have force constants K(1) and K(2) , where K(1)gtK(2). On ...

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  14. A amn rowing a boat upstream is at rest with respect to shore. (a) Is ...

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  15. A pump motor is used to deliver water at a certain rate from a given p...

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  16. A spring is compressed by tieing its ends together tightly. It is then...

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  17. (a) Two masses one n times heavier than the other are dropped from sam...

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  18. (a) Can kinetic energy of a system be changed without changing its mom...

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  19. A meteorite burns in the atmosphere before it reaches the earth ' s su...

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  20. Can a body have momentum without energy?

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