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From the following activities find out w...

From the following activities find out whether work is positive, negative or zero. Give reasons for your answers: Catching the ball which you friend has thrown towards you

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CHETANA PUBLICATION-WORK AND ENERGY-EXERCISE
  1. From the following activities find out whether work is positive, negat...

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  2. Forces are of …..…… types

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  3. Fill in the blanks with appropriate words and writw the completed stat...

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  4. S.I. unit of energy is….

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  5. …………..is the capacity to do work.

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  6. Name the following SI unit of energy

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  7. Name the following The relationship between 1 joule and 1erg .

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  8. State whether the following statements are true or false: Power is a ...

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  9. State whtether the following statement are true or false. Water stored...

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  10. Wind can move the blades of a windmill

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  11. A stretched rubber band when released regainsits original length

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  12. An exploding fire cracker lights as well as makes a sound.

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  13. Solve the following examples: Ravi applied a force of 10 N and moved ...

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  14. 500 kg water isstored in the overhead tank of a 10 m high building.Cal...

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  15. 1 kg mass has a kinetic energy of 2 joule. Calculate its velocity

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  16. Derive an expression for potential energy.

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  17. A 25 W electric bulb is used for 10 hours every day. How much electric...

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  18. If a TV of rating 100 W is operated for 6 hrs per day,find the number ...

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  19. Solve the following examples: If a 1200 W electric iron is used daily...

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  20. Answer the following questions: Derive the formula for the kinetic en...

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  21. State the expression for work done when displacement and force makes a...

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