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Swaralee takes 40 s to carry & bag weigh...

Swaralee takes 40 s to carry & bag weighing 20 kg to a height of 5 m. How much power has she used?

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TARGET PUBLICATION-WORK AND ENERGY-EXERCISE
  1. If a body possesses 980 joules of P.E. and 20 joules of K.E., then wha...

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  2. What is the power of an object which does 600 joules of work in 1 minu...

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  3. Swaralee takes 40 s to carry & bag weighing 20 kg to a height of 5 m. ...

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  4. Solve the following examples: An electric pump has 2 kW power. How mu...

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

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

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  7. An electric oven is rated 1600 W. How much energy (in kWh) does it use...

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  8. Mass of a vehicle is 1500 kg. While ascending on a road, its speed dec...

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  9. Megha applied a force of 50 N to move a stool from one comer of a 10 m...

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  10. A car moving with velocity 54 km/hr has kinetic energy 1500 J. Find it...

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  11. The energy required to move a body of mass 10 kg from the ground to 5 ...

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  12. 5. A dam on Vaitama river stores about 60000 kg of water at a height o...

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  13. Calculate the power of pump lifting 100 kg of water and storing it in ...

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  14. A 50 W electric bulb is used for 8 hours every day. How much electrici...

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  15. A house consumes 300 units of energy during month of June. How much en...

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  16. Seema takes 1 minute to carry a bag weighing 20 kg to a height of 12 m...

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  17. From scientific point of view,when do we say that no work was done?

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  18. What are the different types of force and their examples?

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  19. Choose the correct alternative. Force applied on a wall results in to...

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  20. Choose the correct alternative. When fire crackers are exploded, the ...

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