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Look at the activities listed below. Rea...

Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term 'work'. A green plant is carrying out photosynthesis.

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PSEB-WORK AND ENERGY-EXERCISE
  1. Look at the activities listed below. Reason out whether or not work is...

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  2. Look at the activities listed blew. Reson out whether or not work is d...

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  3. Look at the activities listed below. Reason out whether or not work is...

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  4. Look at the activities listed below. Reason out whether or not work is...

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  5. Look at the activities listed below. Reason out whether or not work is...

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  6. Look at the activities listed below. Reason out whether or not work is...

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  7. An object throw at a certain angle to the ground moves in a curved ...

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  8. A battery lights a bulb. Describe the energy changes involved in the p...

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  9. Certain force acting on a 20 kg mass changes its velocity from 5ms ^-...

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  10. A mass of 10 kg is at a point A on a table. It is moved to a point B. ...

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  11. The potential energy of a freely falling object decreases progressivel...

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  12. What are the various energy transformations that occur when you are ri...

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  13. Does the transfer of energy takes place when you push a huge rock with...

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  14. A certain household has consumed 250 units of electric energy during a...

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  15. An object of mass 40 kg is raised to a height of 5 m above the ground....

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  16. What is the work done by the force of gravity on a satellite moving ro...

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  17. Can there be a displacement of any object in the absence of any extern...

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  18. A person holds a bundle of hay over his head for 30 minutes and gets t...

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  19. An electric heater is rated 1500W. How much energy does it use in 10 h...

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  20. Illustrate the law of conservation of energy by discussing the energy ...

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