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Total energy of a system is always conse...

Total energy of a system is always conserved , no matter what internal and external forces on the body are present .

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False , the external force on the system may increase or decrease the total energy of the system.
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KUMAR PRAKASHAN-WORK, ENERGY AND POWER -SECTION - B Numericals (Numerical From Textual Exercise)
  1. In an inelastic collision of two bodies, the quantities which do not c...

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  2. In an elastic collision of two bodies , the momentum and energy of eac...

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  3. Total energy of a system is always conserved , no matter what internal...

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  4. Work done in the motion of a body over a closed loop is zero for ever...

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  5. In an elastic collision , the final kinetic energy is always less than...

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  6. In an elastic collision of two bodies , the momentum and energy of eac...

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  7. Explain the total linear momentum is conserved in an elastic collis...

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  8. Practically, if 10kJ of energy is supplied to a device, how much energ...

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  9. If the potential energy of two billiard balls depends only on the sepa...

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  10. A body is initially at rest . It undergoes one - dimensional motion w...

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  11. A body is moving indirectionally under the influence of a source of co...

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

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

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

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

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  16. A pump on the ground floor of a building can pump up water tofill a ta...

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  17. Two identical ball bearings in contact with each other and resting on ...

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

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  19. The bob of pendulum is released from a horizontal position . If the le...

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  20. A trolley of mass 30 kg carrying a sandbag of 25 kg is moving uniform...

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