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What do you understand by positive work,...

What do you understand by positive work, negative work and zero work? Give at least two examples of each type.

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MBD-WORK, ENERGY AND POWER-EXAMPLE
  1. In what part of its orbit is the earth's potential energy greatest wit...

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  2. Explain the term work. Obtain an expression for work done by a constan...

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  3. What do you understand by positive work, negative work and zero work? ...

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  4. Explain work done by a variable force.

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  5. give relation between joule and erg. Also derive dimensional formula o...

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  6. State and prove work-energy theorem.

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  7. State law of conservation of energy with examples. Explain the transfo...

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  8. Discuss potential energy of a coiled spring.

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  9. Define the term collision. Discuss its types with examples.

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  10. Discuss the elastic collision in one dimension and calculate the veloc...

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  11. Define elastic and inelastic collisions. A lighter body collides with ...

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  12. During inelastic collision between two bodies, which of the following ...

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  13. The potential energy of a certain particle is given by U = 30x^2 - 20 ...

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  14. A bomb of mass 9 kg explodes into pieces of masses 3 kg and 6 kg. The ...

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  15. 1 g of water cools down from its boiling point to its freezing point, ...

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  16. A railway carriage of mass 9,000 kg moving with a speed of 36 km h^-1 ...

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  17. A shot travelling at the rate of 100 ms^-1 is just able to pierce a pl...

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  18. A trolley of mass 200 kg moves with a uniform speed of 36 km//h on a f...

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  19. Shown in the figure a spring fixed at the bottomm end of all incline o...

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  20. Shown in the figure a spring fixed at the bottomm end of all incline o...

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