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Under what conditions is work said to be...

Under what conditions is work said to be done?

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MODERN PUBLICATION-WORK AND ENERGY-EXERCISE
  1. Give an example of a body having potential energy due to change in sha...

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  2. If the speed of the body is halved. What is the change in kinetic ener...

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  3. Under what conditions is work said to be done?

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  4. Write an expression for kinetic energy of an object. On what factors d...

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  5. Derive a relationship between kinetic energy and linear momentum.

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  6. Two bodies of mass m1 andm2(>m1) have equal linear momentum. Which bod...

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  7. Two bodies of mass m1 andm2(>m1) have equal kinetic energies. Which b...

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  8. Give an example in which the following energy conversion takes place ....

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  9. Give an example in which the following energy conversion takes place. ...

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  10. Define power. What is its SI unit? Give a relationship between power, ...

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  11. What type of energy is stored in the following cases? A stretched ru...

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  12. What type of energy is stored in the following cases? A compressed s...

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  13. What type of energy is stored in the following cases? An extended sp...

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  14. What type of energy is stored in the following cases? An object at a...

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  15. What type of energy is stored in the following cases? A stretched bo...

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  16. How do green plants produce food? Where do they get their energy from?

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  17. Why does air move from place to place?

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  18. How are fuels such as coal and petroleum formed?

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  19. The velocity of a body moving in a straight line is increased by apply...

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  20. Is it possible that a force is acting on a body but still work done is...

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